The Duquesne Gardens (officially Duquesne Garden until 1940 and The Gardens afterward) was the main sports arena located in Pittsburgh, Pennsylvania, during the first half of the 20th century. Built in 1890, the building originally served as a trolley barn, before becoming a multi-purpose arena. The Gardens opened three years after a fire destroyed the city's prior sports arena, the Schenley Park Casino, in 1896. Over the years, the Gardens was the home arena of several of Pittsburgh's historic sports teams, such as ice hockey's Pittsburgh Pirates and Pittsburgh Hornets. The Western Pennsylvania Hockey League, which was the first ice hockey league to openly hire and trade players, played all of its games at the Gardens. The arena was also the first hockey rink to ever use glass above the dasher boards. Developed locally by the Pittsburgh Plate Glass Company, Herculite glass was first tested in Pittsburgh. Most rinks were using wire mesh before the shatterproof glass was invented. Finally, the Pittsburgh Ironmen, a charter member of the Basketball Association of America (a forerunner of the National Basketball Association), played at the Gardens from 1946 to 1947.

Outside team sports, the Duquesne Garden Ball Room, located on the arena's second floor, was also one of the largest dance halls in the country during the time.

Duquesne Garden was originally built in 1890 as a trolley barn for the Duquesne Traction Company in the city's Oakland neighborhood. In 1895, Christopher Lyman Magee, a Pittsburgh politician, spent nearly $500,000 ($19.4 million in 2025) to purchase and renovate the building. He named the transformed structure Duquesne Garden, although it was always called the "Arena" by the locals. The Garden, which had the world's largest indoor ice rink and a second-floor ballroom, became a premier indoor venue.

Speed skating, roller skating, dance contests, musical performances, roller derby, bicycle racing, and college basketball were all hosted at the Garden, as were rodeos and the circus. The Garden also featured Pittsburgh Golden Gloves boxing and housed a movie theater. The Duquesne Garden Ball Room, located on the second floor, has been used by some of the leading clubs and societies in the city for their annual dances. The building quickly became the site for all manner of gatherings: There were opera performances, boxing matches and political rallies.

However, the facility's main attraction was its artificial ice surface, unrivaled in North America. Most other American cities lacked a facility that produced artificial ice at the time. And with 26,000 square feet of ice surface at the Garden, was nearly 50 feet longer than the modern-day rinks in the National Hockey League (NHL) and had state-of-the-art refrigeration and resurfacing technology. On January 24, 1899, the Garden hosted its first ice hockey game in a match between the Pittsburgh Athletic Club and Western University of Pennsylvania (University of Pittsburgh). According to Total Hockey, the official encyclopedia of the NHL, Pittsburgh was one of the first cities in North America to lure amateur Canadian players for what was a standard $30 a week stipend and a local job in the early 1900s. The manager of a Canadian team returned from a trip to the Garden in 1902, according to an account in Total Hockey, and gave the following description to the Toronto Globe: "Pittsburgh is hockey crazy. Over 10,000 turned out for our three games there. The general admission being 35 cents and 75 cents for a box seat . . . the Pittsburgh rink is a dream . . . What a marvellous place it is."

The teams of the Western Pennsylvania Hockey League, and the Pittsburgh Professionals of the International Professional Hockey League, played their games at the Garden up until 1909. The Garden's artificial ice surface helped make Pittsburgh a professional hockey pioneer, much the way the region had given birth to the first professional American football players in the 1890s. Players in the WPHL were paid to play hockey before 1904, but that is when the first professional league officially formed. The Pittsburgh Professionals joined Canadian Soo, Michigan Soo, Calumet Miners, and the Portage Lakes Hockey Club to form the IPHL in 1904. However, after the 1906–07 season, other professional leagues began popping up and the IPHL disbanded, while the WPHL was revived until 1909. During this era, Garnet Sixsmith, who played on several Pittsburgh teams, once scored 11 goals in a game at the Garden. His 11 goals is considered to be a record for the arena.

From 1910 to 1915, hockey and ice skating at the Garden were replaced by roller skating, which was experiencing a wave of popularity. Hockey was brought back in the winter of 1915–16, when the amateur Duquesne Garden hockey team (which later played under the banner of the Pittsburgh Athletic Association and further evolved into the Pittsburgh Yellow Jackets of the United States Amateur Hockey Association) was founded. The Carnegie Tech hockey club and the University of Pittsburgh hockey team also played their home games at the Garden. Crowds also attended skating sessions at Garden and took part in public skating events. In 1920, public skating was held every evening, except on days for performances, with Saturday morning being set aside for school children who wanted to learn how to skate.

On March 16, 1920, the United States men's national ice hockey team was founded at the Garden. That same year at the Garden, Roy Schooley, the arena's manager, put together an 11-player squad that won silver at the Antwerp Games, in the sport's Olympic debut. The Garden also hosted several contests, which were played on Mondays and Tuesdays, to help raise money in order to cover the expenses associated with sending the U.S. Olympic Hockey team to the games held in Antwerp, Belgium.