Barbaralee Diamonstein-Spielvogel, born January 27, 1932) is an American preservationist, historian, author, and television producer. She is an advocate for the preservation of the historic built environment and the arts. A graduate of New York University, she has worked in the fields of art, architecture, crafts, historic preservation, fashion, and public policy in the U.S. She is the author of 25 books, numerous articles and essays, and recipient of many honors and awards. She is a former White House Assistant, the first Director of Cultural Affairs in New York City, the longest serving New York City Landmarks Preservation Commissioner and chair of the New York State Council on the Arts. Barbaralee Diamonstein-Spielvogel was married to renowned business executive, Carl Spielvogel, for forty years. He died in 2021.

From 1963 to 1966, she served as a White House Assistant at The White House, where she helped create the White House Fellows, the Presidential Scholars Program, and the first and only White House Festival of the Arts in 1965. In 1966, she was appointed by Mayor John V. Lindsay as the first Director of Cultural Affairs in New York City. As director, she organized the first public art exhibition, which was in Bryant Park with artist Tony Smith, the first public performance in Central Park by the Metropolitan Opera, the first city-wide Poetry Festival, and the first week-long festival of films about New York at the Regency Theatre (with a talk after each film by a notable critic or scholar, such as Pauline Kael, Vincent Canby, Donn Alan Pennemaker, Andrew Sarris, and Brendan Gill). Another of her important contributions as first Director was to codify the inclusion of cultural institutions in the New York City annual budget process; under her leadership, the 15 cultural institutions housed in City-owned buildings, or on City-owned property, which had been receiving their City support from the Bureau of the Budget, were added to the Cultural Affairs agency budget.

In 1972, Mayor Lindsay appointed Diamonstein-Spielvogel to be a Commissioner of the NYC Landmarks Preservation Commission. She served until 1987, the longest serving Commissioner for this agency. She also served, for more than a decade, on the NYC Advisory Commission for Cultural Affairs (1975 to 1986); now the Cultural Affairs Advisory Commission. In this role, she created and became Chair of the Mayor's Awards of Arts and Culture. Diamonstein-Spielvogel was appointed a Fellow at the Aspen Institute in 1977; served on the Board of the Municipal Art Society, and as Chair of its Benefit Committee from 1973 to 1983; and was a Founding Member of the New York Landmarks Conservancy, where she created of the Living Landmarks Program.

From 1987 to 1995, she was named Chair of the NYC Landmarks Preservation Foundation, where she created and funded programs for the placement of Historic District street signs, descriptive markers, and maps in each of New York City's then-84 Historic Districts, which have since become models for similar initiatives throughout the United States. The historic markers and street name signs were designed pro bono by renowned designer Massimo Vignelli and colored terra cotta, black and white, to blend well with many building materials. They were reviewed and approved by both the Landmarks Preservation Commission, and the Public Design Commission, and became City standards for NYC Historic Districts after Diamonstein-Spielvogel entered into an agreement with the city, for the NYC Department of Transportation to maintain the signs and finance additional signs.

In 1995, she became Chair of Historic Landmarks Preservation Center (HLPC), where she created a Cultural Medallion program which documents notable occurrences, distinguished individuals and other important aspects of New York City's cultural, economic, political and social history. The medallions were also designed pro bono by Massimo Vignelli.

In 1987, she was appointed by President Ronald Reagan to the Board of the United States Holocaust Memorial Museum, where, a Founding Member, she served as Chair of the subcommittee that commissioned all of the original art created for the museum. She was appointed by Mayor David Dinkins to the Art Commission of the City of New York (now the Public Design Commission), and served as his representative from 1991 to 1994.

In 1996, she was appointed to the United States Commission of Fine Arts by President Bill Clinton, and was the first woman Vice Chair of the Commission, where she served until 2003. In 2010, Diamonstein-Spielvogel was appointed a founding director of the Trust for the National Mall in Washington D.C.

President Barack Obama appointed her a Commissioner, in 2009, of the American Battle Monuments Commission, which has responsibilities related to the design, construction, and maintenance of military memorials throughout the world. She chaired the ABMC New Memorials Committee, and represented the U.S.A. at Armistice commemorations and memorial dedications in the Netherlands, France, Italy, Belgium, England, Guam, and Iceland. On July 28, 2013, during the 60th anniversary commemorations of the signing of the armistice that ended the Korean War, she dedicated a U.S. monument that was dedicated in the United Nations Memorial Cemetery in Busan, South Korea. It was the first non-World War I or World War II monument constructed by ABMC outside the U.S. Diamonstein-Spielvogel represented ABMC and led the U.S. delegation at the Busan anniversary events, where she was the keynote speaker and laid a wreath in honor of the memory of American, Korean and U.N. Troops. The event was attended by leaders and veterans of 21 participating nations. In 2017, she represented ABMC and spoke at the dedication of the Dartmouth Monument, in Dartmouth, England, on the occasion of the 73rd Anniversary of the D-Day landings.