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Guardian Building
Guardian Building is located in Michigan
Guardian Building
Guardian Building is located in the United States
Guardian Building
Map
Interactive map showing the location of Guardian Building
Location500 Griswold Street
Detroit, Michigan
Coordinates42°19′47″N 83°2′45″W / 42.32972°N 83.04583°W / 42.32972; -83.04583
Built1929
ArchitectWirt C. Rowland of Smith, Hinchman & Grylls
Architectural styleMayan Revival, Art Deco
Part ofDetroit Financial District (ID09001067)
NRHP reference No.89001165
Significant dates
Added to NRHPJune 29, 1989[2]
Designated NHLJune 29, 1989[1]

The Guardian Building is a landmark 43-story office skyscraper in the Financial District of downtown Detroit, Michigan. Built from 1928 to 1929, the building was originally called the Union Trust Building[3] and is a bold example of Art Deco architecture, including art moderne designs.[4] It was designated a National Historic Landmark in 1989, and is currently owned by Wayne County.[2]

Architecture

[edit]
Tall Spire
Shorter Spire

The main frame of the skyscraper rises 32 stories, capped by two asymmetric spires, one extending for seven additional stories. The roof height of the building is 496 ft (151 m), the top floor is 489 feet (149 m), and the spire reaches 632 ft (192.6 m). Its nickname, Cathedral of Finance, alludes both to the building's resemblance to a cathedral—with its tower over the main entrance and octagonal apse at the opposite end—and to New York City's Woolworth Building, which had earlier been dubbed the Cathedral of Commerce.[4] Native American themes are common inside and outside the building. Wirt C. Rowland, of the Smith, Hinchman & Grylls firm, was the building's architect. The building rises from a granite and stone six story base with two sculptures created by Corrado Parducci flanking the Griswold Street entrance.

The architect closely supervised the building of the exterior, which includes brickwork with tile, limestone, and terra cotta. The colored brick that Rowland selected for the exterior came to be marketed by the manufacturer as “Union Trust Brick” and, after 1939, as “Guardian brick”.[5] Rowland designed furniture for the bank's offices as well as tableware, linens, and waitress uniforms for a restaurant in the building.

The building's three-story, vaulted lobby is lavishly decorated with Pewabic and Rookwood tile. The semi-circular exterior domes are filled with Pewabic Pottery; Mary Chase Perry Stratton worked closely with the architect in the design of the symbolic decorations.[6] (See Savage, infra.) A Monel metal screen divides the lobby from the banking hall on the second floor, the screen features a clock in the center designed by Tiffany. The building includes works by muralist Ezra Winter in the mosaic above the main lobby desk and the mural at the end of the banking hall.[7] The large mosaic is of a pine tree and text that states the Union Trust Company's purpose for the building, "Founded on principles of faith and understating, this building is erected for the purpose of continuing and maintaining the ideals of financial services which promoted the organization of the institution". The mural highlights Michigan's industries such as manufacturing, farming and mining. In order to dampen the sound in the banking hall, its cement-plaster ceiling features a hand-painted canvas ceiling, which was stretched over a mat of horsehair.

Innovations

[edit]
The Monel Metalwork

The Guardian Building featured innovations in both design and technology. The building's designer, Wirt Rowland, specified Monel metal in place of the commonly used brass and bronze for all exposed metalwork on the building, an innovation which was widely adopted, most notably on New York's Chrysler Building. Rowland dispensed with traditional forms of decoration, using instead colored materials (brick, stone, and terra cotta) set in geometric patterns on both the interior and exterior of the structure. The building's elevator system represented the first use of technology which automatically stopped the car level with the floor and opened the doors, tasks formerly handled by the operator.[8]

William Edward Kapp, architect for the firm of Smith, Hinchman & Grylls has been credited with interior design work on the Guardian Building.[9]

History

[edit]

The skyscraper was built by the Union Trust Company, founded in Detroit in 1890 by Senator James McMillan, and Dexter M. Ferry, along with investments from Russell A. Alger, Col. Frank J. Hecker, and Christian H. Buhl.[4] During World War II, the Guardian Building served as the U.S. Army Command Center for war time production.[4] The Guardian served various tenants as an office building in downtown Detroit. In 1982 it became the headquarters of Michigan Consolidated Gas Company ("MichCon") subsequent to the divestiture of MichCon by ANR Company in 1981. Under the leadership of President and COO Stephen E. Ewing, MichCon restored the lobby and vaulted ceilings on the first floor in 1986. It would stay MichCon's later to be called MCN Energy Group headquarters until the merger of MCN with DTE Energy in 2001. It was sold by DTE to a local real estate developer, the Sterling Group, in 2002.

The Sterling Group invested $14 million in the building and reopened the lobby to the public, which had only been accessible to employees after MichCon purchased the building.

On July 18, 2007, Wayne County Executive Robert Ficano announced it has entered into an agreement to purchase the Guardian Building to relocate its offices from the Wayne County Building. The deal was reportedly part of a larger deal worth $33.5 million in real estate purchases in downtown Detroit.[10] The Guardian Building has become a souvenir item along with other Detroit skyscrapers.[11]

Tenants

[edit]
  • SmithGroup[12]
  • Wayne County - Departments: Buildings, Commission, Corporation Counsel, Department of Information Technology, Economic Development Corporation, Management & Budget, Economic Development, Wayne County Land Bank, Benefits, County Executive, Healthchoice, Health, Veterans Services, Prosecutors & Detectives, Personal/Workforce, Indigent Defense Services, Juvenile and Youth Services
  • Detroit Transportation Corporation
  • Detroit Land Bank Authority
  • Guardian Cafe Featuring James Oliver Coffee
  • Bank of America
  • Huron Capital
  • Detroit Economic Growth Corporation
  • Eagle Security Services
  • Federal Criminal Attorneys of Michigan
  • Law Office of Sklar & Rataj
  • Jacobs & Diemer
  • Roncelli Construction Services
  • Attorney Kenneth Sebree
  • Wade Trim
  • WSP
  • Bajoka Law Group
  • Guardian Store
  • Green Room
  • Crazy Gring
  • Land Capital Ventures
  • Law Office of Maria Mannarino
  • Steingold Law Firm
  • The Detroit People Mover
  • City Tour Detroit
  • The Monzo Group
  • St. J Style
  • Law office of Nathan & Kamionski
  • Pitts Law Firm
[edit]
  • The Guardian Building, flying the American flag over the Detroit Financial District
    The Guardian Building, flying the American flag over the Detroit Financial District
  • Top of the Guardian Building, with The Qube in the foreground
    Top of the Guardian Building, with The Qube in the foreground
  • The sculptures of Safety and Security flank the main entrance
    The sculptures of Safety and Security flank the main entrance
  • Semi-circular dome over the main entrance
    Semi-circular dome over the main entrance
  • Monel metal gates in the basement
    Monel metal gates in the basement
  • Lower lobby
    Lower lobby
  • Ceiling tile in the lobby
    Ceiling tile in the lobby
  • Banking hall
    Banking hall
  • Lamp in the elevator lobby
    Lamp in the elevator lobby
  • Guardian Building Stair Well
    Guardian Building Stair Well
  • Pedestrian bridge between the Guardian Building and One Woodward Avenue
    Pedestrian bridge between the Guardian Building and One Woodward Avenue

See also

[edit]

References

[edit]

Further reading

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Guardian Building

View on Grokipedia
from Grokipedia
The Guardian Building is a 40-story in , , originally constructed as the Union Trust Building between 1928 and 1929. Designed by architect Wirt C. Rowland of the firm Smith, Hinchman & Grylls, it stands 496 feet tall and was the world's tallest masonry structure upon completion, featuring distinctive orange "Guardian" bricks, multicolored marbles, and intricate tilework. Designated a in 1989, it exemplifies the bold exuberance of architecture and remains a prominent symbol of Detroit's early 20th-century financial prominence. Commissioned by the Union Trust Company, the building's construction began with demolition in March 1927 and culminated in its grand opening on April 2, 1929, amid the onset of the Great Depression. The structure's exterior is clad in over 1.8 million tangerine-colored bricks produced specifically for the project, topped with a granite base and polychromed terra cotta accents, while the interior boasts luxurious materials such as Italian Travertine and Numidian marbles, Rookwood pottery tiles, and Pewabic Pottery accents. Its main lobby, often likened to a cathedral nave, features a vaulted ceiling with vibrant hexagonal tiles, massive marble columns, and murals by artist Ezra Winter depicting Michigan's industries, earning it the nickname "Cathedral of Finance." Additional highlights include sculptural reliefs by Corrado Parducci, gold leaf detailing, and specialized spaces like a three-level basement vault with a firing range and a 32nd-floor theater. Renamed the Union Guardian Building in 1932 and later simply the Guardian Building, it served as the headquarters for the Guardian Trust Company until the , after which it faced periods of decline before revitalization efforts. In , Wayne County acquired the property for $14.5 million, restoring its grandeur and converting much of the space into government offices while preserving public access to the lobby. Today, it houses Wayne County administrative functions, architectural firm SmithGroup, and commercial tenants, continuing to draw visitors for tours that showcase its in Detroit's architectural heritage and the of the American .

History

Construction and Early Years

The Union Trust Company was founded in Detroit in 1890 by Senator James McMillan, Dexter M. Ferry, and other prominent investors, including contributions from . By the 1920s, amid Detroit's industrial expansion, the company had grown into one of the city's largest financial institutions, merging with the National Bank of Commerce in 1928 and necessitating a new, expansive headquarters to accommodate its operations. This growth underscored the need for a structure that symbolized financial power and modernity during the era's economic optimism. In 1927, the Union Trust Company commissioned the architectural firm Smith, Hinchman & Grylls to design the building, assigning the project to its head designer, Wirt C. Rowland. The selected site at 500 Griswold Street required clearing an entire city block bounded by Griswold, Larned, and streets, involving the demolition of five existing structures starting in March 1927. Construction commenced later that year, with the foundation completed by October 15, 1927, and the 40-story skyscraper finished in early 1929 at an approximate cost of $12 million. The building officially opened on April 2, 1929, as the Union Trust Building, quickly earning the nickname "Cathedral of Finance" for its imposing presence and innovative design reflective of the style prevalent in late-1920s architecture. Its completion occurred mere months before the October 1929 , which triggered the and severely strained the Union Trust Company, leading to its failure and placement into . In response to , investors reorganized the in 1930 as the Union Guardian Trust Company, prompting the renaming of the building to the Union Guardian Building. From its inception, the structure functioned as the company's primary banking headquarters, housing secure vaults capable of safeguarding millions in assets and numerous offices for .

Mid-20th Century Developments

During World War II, the Guardian Building served as the U.S. Army Command Center, coordinating wartime production efforts, particularly ordinance manufacturing, which highlighted its strategic importance in Detroit's industrial landscape. This temporary military use marked a shift from its original banking functions, as the building's secure structure and central location made it suitable for such operations. Following the war, the structure faced financial challenges, including bankruptcy proceedings in 1949 and a public auction sale in 1952 to the Guardian Building Co., reflecting the broader post-war economic adjustments in the city. In the post-war period, the Michigan Consolidated Gas Company (MichCon) emerged as the building's largest tenant starting in the early , occupying significant and stabilizing its operations amid fluctuating tenancy. To accommodate MichCon's needs, minor architectural adaptations were made, including the construction of a pedestrian skybridge in 1976 connecting the Guardian Building at the 15th floor to MichCon's adjacent structure, facilitating employee movement and operational efficiency. However, by the late , MichCon began relocating portions of its workforce to its new headquarters, leading to reduced occupancy in the Guardian. The 1960s and 1970s brought significant economic pressures to , including , suburban flight, and the 1967 riots, which contributed to a sharp decline in downtown office demand and left the Guardian Building with lower occupancy rates as businesses sought suburban locations. This context exacerbated the building's challenges, with various smaller tenants filling vacancies but unable to fully offset the loss of major occupants like MichCon. In 1975, MichCon purchased the building outright from the remnants of the Union Guardian Trust interests, securing its future under a major corporate steward at a time when many similar structures faced abandonment.

Late 20th and 21st Century Ownership

In 1982, following the divestiture of Michigan Consolidated Gas Company (MichCon) by ANR Company in 1981, the Guardian Building became the headquarters for MichCon, marking a significant shift in its use as a major corporate tenant occupied the landmark. This relocation consolidated MichCon's operations in the structure, which had previously served various office tenants, and emphasized its role in Detroit's financial district during a period of economic challenges for the city. Under MichCon's stewardship, the building remained largely closed to the public, limiting access to its iconic interiors for over two decades while focusing on utilitarian office functions. The building received National Historic Landmark designation on June 29, 1989, the highest level of recognition from the National Park Service, which underscored its architectural significance and imposed federal standards for preservation to protect its Art Deco features amid ongoing urban decline. This status, combined with its prior listing on the National Register of Historic Places, facilitated access to preservation incentives and highlighted the need for maintenance of its unique materials, such as Pewabic pottery tiles and Minnesota Rookwood tiles, ensuring long-term viability as a cultural asset. After MichCon merged with in 2001, the company vacated the premises, prompting DTE to sell the property to the Sterling Group, a Detroit-based developer, in 2002 for an undisclosed amount. The Sterling Group invested approximately $14 million in restoration efforts, including repairs to the lobby and structural elements, which reopened public access to the building's grand interiors in the early after a roughly 25-year closure. These improvements revitalized the space, allowing visitors to experience its vaulted ceilings and murals while adapting upper floors for modern office use, though challenges persisted in attracting long-term tenants. In 2007, Wayne County acquired the Guardian Building from the Sterling Group for $14.5 million, relocating its executive offices and consolidating approximately 500 employees there to centralize operations and reduce rental costs from its previous . The purchase, approved through bonds, included plans for further renovations totaling around $52 million over subsequent years, focusing on HVAC upgrades and improvements to support governmental functions while preserving historic elements. Under Wayne County ownership, the building has served as the county's , balancing administrative needs with public tours and events. As of 2025, Wayne County continues to oversee ongoing maintenance, including enhanced security measures and adaptations for event spaces on the promenade and 32nd floor to accommodate community gatherings without compromising the structure's integrity. In March 2025, a targeted lobby upgrade was completed, installing new fixtures near the ceiling to better illuminate the details, such as the murals and marble accents, improving visibility for visitors and events. In mid-2025, tenant Wade Trim completed a major renovation of the 25th floor, involving demolition and rebuilding to create modern flexible office spaces.

Architecture

Exterior Design

The Guardian Building stands at 496 feet (151 meters) to its roof and reaches 632 feet (193 meters) including its prominent spire, comprising 40 stories in total. Its massing draws inspiration from Mayan temple architecture, featuring a taller north tower and a shorter south tower connected by a nave-like central block, creating a cathedral-like silhouette that emphasizes verticality and asymmetry. This design culminates in two spires, with the primary one extending upward to enhance the building's dramatic profile against the sky. The structure's base, extending up to the third floor, is clad in and , providing a sturdy and ornate foundation that transitions smoothly to the upper levels. Above this, the facade employs approximately 1.8 million tangerine-colored bricks, a custom shade known as "Guardian Brick," laid in a to form the building's warm, vibrant exterior. terra cotta accents the upper stories, featuring oversized geometric patterns and motifs inspired by Native American and Mayan Revival aesthetics, such as stepped pyramids and abstract tribal symbols that evoke ancient cultural grandeur. Sculptural elements adorn the facade, primarily the work of artist Corrado Parducci, whose reliefs include symbolic figures representing safety and security flanking the main Griswold Street entrance, as well as eagle motifs and elaborate headdresses integrated into the ornamentation. These carvings, executed in a stylized manner, blend with the building's Native American influences to convey themes of protection and prosperity. As a key element of Detroit's Financial District skyline, the Guardian Building's bold coloring and stepped massing distinguish it among neighboring structures, contributing to the area's cohesive yet eclectic architectural character since its completion in 1929.

Interior Design

The interior of the Guardian Building exemplifies design through its opulent use of materials and motifs, creating a sense of grandeur in enclosed spaces. The main lobby features a three-story vaulted adorned with brilliantly colored Rookwood tiles in shades of green, blue, and gold, contributing to the space's luminous and intricate aesthetic. Walls are clad in deep red Numidian imported from , providing a striking contrast against the Italian used for floors and steps. A large ornamental screen of metal separates the lobby from the adjacent banking hall, enhancing the functional yet decorative flow of the interior. The lobby's artistic highlights include a massive glass mosaic above the main desk and symbolic custom tiles by Mary Chase Stratton's crowning the Griswold Street entrance semi-dome, incorporating geometric patterns inspired by Native American and Mesoamerican designs. artist Winter created the prominent in the original banking hall, depicting the state's industries and with gold leaf accents for dramatic effect. The banking hall itself boasts Art Deco-style tellers' cages framed in brass and Monel metal, underscoring the era's emphasis on luxurious banking environments. Tavernelle marble from lines these areas, including restrooms, maintaining the high-quality material palette throughout. The Guardian Club on the 32nd floor and the adjacent Promenade serve as event spaces, offering panoramic views while preserving the building's original ornamental details in their design.

Innovations

Material and Construction Techniques

The Guardian Building's construction pioneered the extensive use of Monel metal, a nickel-copper developed in the early , for exposed interior and exterior elements such as the large ornamental screen dividing the banking hall and main lobby, elevator doors, and other metal fabrications. This material, noted for its corrosion resistance and silvery finish, replaced traditional and , marking one of the earliest large-scale applications in a and contributing to the building's durable, modern aesthetic. A workforce of 40 Michigan-based artisans crafted the building's custom decorative elements, including intricate tile work, mosaics, stained glass, and marble inlays that enhanced its Art Deco geometric patterns. These local craftsmen, such as those from Pewabic Pottery who produced richly colored tiles inspired by Spanish designs, collaborated on vaulted ceilings, murals by Ezra Winter, and relief sculptures by Corrado Parducci, ensuring handcrafted details throughout the interior. Structurally, the building combined a 40-story steel frame with extensive masonry cladding, utilizing 1.8 million custom orange bricks—later marketed as "Guardian Brick"—to create the world's tallest masonry-faced skyscraper at completion, providing height stability through the rigid integration of load-bearing masonry at the base and infill panels. This hybrid approach balanced the era's early steel framing innovations with traditional masonry for fire resistance and visual solidity. Polychrome terra cotta, produced by the Atlantic Terra Cotta Company, adorned the upper stories with over-scaled, multi-hued blocks in greens, whites, pinks, and golds, achieved through specialized glazing and firing techniques that allowed for vibrant color variations visible from street level. Exotic materials underscored the 1920s economic boom's emphasis on luxury, including deep red Numidian marble imported from for wainscoting and columns—sourced from quarries that had been depleted and partially reopened—and Italian for steps and walls, contrasting with rare Belgian bases. These high-end imports highlighted the project's opulence and networks.

Technological Features

The Guardian Building incorporated several mechanical and functional innovations that were advanced for a 1929 , emphasizing efficiency, safety, and security in its systems. The setup was groundbreaking, featuring one of the first implementations in of automatic leveling and door-opening mechanisms, which eliminated the need for manual operation by attendants and improved reliability. These included separate public and private cars, with doors crafted from durable metal by the Dahlstrom Metallic Door Company. A specialized freight with a 20,000-pound capacity further supported secure operations by allowing armored vehicles to unload indoors. The building's HVAC system represented an early adoption of conditioned air technology in high-rises, distributing centrally cooled air to the first 16 floors to maintain comfortable environments in offices and public spaces. Lighting innovations complemented this, with the lobby employing indirect illumination through simulated skylights constructed from 4-inch square glass tiles, lead channels, prisms, and crinkled glass imported from , simulating natural daylight while reducing glare. Original fixtures, such as amber glass lamps from , enhanced the aesthetic and functional quality of the illumination throughout the structure. Security features extended to the banking vaults, which utilized custom metal gates and doors equipped with combination locks to safeguard valuables. 's durability, derived from its nickel-copper composition offering superior resistance and strength, made it ideal for such high-security applications. Fireproofing relied on encasing the beams in and terra cotta cladding, a technique that provided robust protection against fire while supporting the building's 40-story height. Electrical wiring was integrated early into walls and floors to facilitate efficiency, powering the extensive lighting, elevators, and other systems without compromising the architectural design.

Significance and Use

Historical and Cultural Importance

The Guardian Building stands as an exemplar of architecture among American skyscrapers, distinguished by its innovative blending of Mayan Revival elements that evoke regional identity through motifs inspired by Native American and Aztec aesthetics. This fusion, evident in the building's terracotta cladding and geometric ornamentation, reflects the era's fascination with indigenous influences adapted to modern . Completed in , it exemplifies the style's exuberance while incorporating local craftsmanship, such as tiles and Rookwood Pottery accents, to create a visually striking landmark. As a symbol of Detroit's booming automotive prosperity in the , the building—originally the Union Trust Building—earned the moniker "Cathedral of Finance" for its grand, church-like interior that conveyed stability and grandeur amid the city's economic ascent. Constructed at the peak of the , it represented the optimism of an industrial powerhouse, with its opulent banking hall underscoring the financial might of institutions like the Union Trust Company, which controlled nearly 40% of the region's banking resources. During , the structure briefly served as a U.S. Army command center, adding to its legacy of multifaceted historical service. In 1989, the Guardian Building received designation as a by the , the highest federal recognition for its architectural and historical value, alongside listing on the that same year. This status has bolstered its role in urban preservation efforts within declining industrial cities, exemplifying how of landmarks can anchor revitalization in areas like facing economic challenges. The building's cultural significance extends to its depictions in media and popularity in guided tours, which often highlight the contributions of artisans who crafted its intricate mosaics, murals, and metalwork using local materials and techniques. It has appeared in films such as Batman v Superman: Dawn of Justice (2016), where it portrayed the headquarters in , showcasing its dramatic interior to global audiences. In 2025, the Skybridge installation by artist Phillip K. Smith III connected the Guardian Building to the adjacent One Woodward building, featuring a dynamic light display at sunset that highlights its architectural prominence. Popular tours, including those by the Historical Society, emphasize these artisan details, fostering public appreciation for the structure's role in 's artistic heritage.

Current Tenants and Public Access

The Guardian Building has served as the headquarters of , since its acquisition by the county in 2007 for $14.5 million, housing several key government departments including the Department of Management and Budget and the Department of Health, Human and Veterans Services. Other notable tenants include the architecture firm SmithGroup, which occupies space in the building and completed a renovation of its office, achieving WELL Gold Certification in April 2025, to reaffirm its commitment to the historic structure it originally designed in the 1920s. maintains a financial center within the building, providing walk-up services and contributing to its role as a hub for financial activities. The Detroit Transportation Corporation also leases administrative offices on the 29th floor, overseeing operations for the system. Several law firms, such as Hertz Schram PC, Bajoka Law, and My Michigan Legal, PLLC, occupy suites in the building, leveraging its central location for legal practices ranging from criminal defense to . Retail options include The Guardian Coffee Shop, operated by James Oliver Coffee Co., which offers drinks and pastries in the lobby area, enhancing daily accessibility for visitors and employees. Leasing opportunities remain available for Class-A office spaces ranging from 1,000 to 16,000 square feet, featuring 24-hour security, panoramic views of , and on-site management support. Public access to the Guardian Building is facilitated through guided tours offered by City Tour Detroit, which provide in-depth explorations of its features, including the iconic lobby with its historical vaulted ceiling and colorful tilework. The building also serves as a venue for events, with rentable spaces such as the Promenade and Guardian Club suitable for meetings, weddings, and conferences, while its official calendar lists ongoing exhibits, pop-up retailers, and community gatherings. Supported by recent upgrades to its systems for improved energy efficiency and operational functionality, the building continues to play a key role in 's downtown revitalization.

References

  1. https://www.guardianbuilding.com/history
  2. https://historicdetroit.org/buildings/guardian-building
  3. https://www.detroithistorical.org/learn/online-research/encyclopedia-of-detroit/guardian-building
  4. https://sah-archipedia.org/buildings/MI-01-WN12
  5. https://detroit1701.org/GuardianBldg.htm
  6. https://detroitarchitecturebook.wordpress.com/2012/01/12/guardian-building-part-one/
  7. https://detroithistorical.org/learn/online-research/encyclopedia-of-detroit/guardian-building
  8. https://docomomo-us.org/register/michigan-consolidated-gas-company
  9. https://www.theguardian.com/cities/2014/apr/03/the-death-of-a-great-american-city-why-does-anyone-still-live-in-detroit
  10. https://www.nytimes.com/interactive/2013/08/17/us/detroit-decline.html
  11. https://the-landmark.fandom.com/wiki/Guardian_Building
  12. https://www.miplace.org/historic-preservation/programs-and-services/historic-landmarks/guardian-building/
  13. https://www.crainsdetroit.com/article/20030804/SUB/308040855/dte-energy-finds-buyer-for-guardian
  14. https://www.globest.com/2007/07/18/county-to-buy-guardian-other-sites-for-33m/
  15. https://www.crainsdetroit.com/article/20071206/SUB/71206005/guardian-building-purchase-approved
  16. https://www.mlive.com/news/detroit/2009/08/wayne_countys_move_to_guardian.html
  17. https://www.guardianbuilding.com/eventspaces
  18. https://www.axios.com/local/detroit/2025/03/12/lighting-upgrade-in-guardian-building-s-art-deco-lobby
  19. https://www.themonahanco.com/projects/project/wade-trim-guardian-building
  20. https://www.skyscrapercenter.com/detroit/guardian-building/10576
  21. https://myhistoryfix.com/architecture/detroit-guardian-building/
  22. https://modeldmedia.com/corradoparduccidowntowndetroit/
  23. https://www.guardianbuilding.com/building-events/private-event-promenade-and-guardian-club
  24. https://michiganarchitecturalfoundation.org/cathedral-of-designthe-guardian-building/
  25. https://michiganarchitecturalfoundation.org/wp-content/uploads/2022/10/The-Guardian-Building-90th-Anniversary-Celebration-Brochure.pdf
  26. https://www.michigan.org/article/trip-idea/detroit-locations-featured-batman-superman-dawn-of-justice
  27. https://lscgallery.com/projects/detroit-skybridge
  28. https://www.detroithistorical.org/events/guardian-building-behind-scenes
  29. https://www.waynecountymi.gov/Government/Departments/Management-Budget
  30. https://www.waynecountymi.gov/Government/Departments/Health-Human-Veterans-Services
  31. https://www.smithgroup.com/projects/smithgroup-detroit-office-renovation
  32. https://locators.bankofamerica.com/mi/detroit/financial-centers-detroit-16284.html
  33. https://www.detroittransit.org/venue/detroit-transportation-corporation/
  34. https://www.hertzschram.com/
  35. https://www.bajokalaw.com/
  36. https://www.mymichiganlegal.com/about
  37. https://www.jamesolivercoffee.com/cafe
  38. https://www.guardianbuilding.com/leasing
  39. https://tourdetroit.com/tour/insiders-guardian-building-tour/
  40. https://www.guardianbuilding.com/building-events
  41. https://kodelabs.com/resources/integration-of-the-building-automation-system-in-the-guardian/
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