Frederick Law Olmsted, known for his work on Central Park in New York City, is credited with promoting the idea of preserving natural and cultural landscapes.

The Society for the Preservation of New England Antiquities, established in 1895, is the oldest regional preservation organization in the United States.

William Howard Taft, the 27th President of the United States, served as the first president of the National Trust for Historic Preservation from 1947 to 1953.

Anne Bailey, a prominent preservationist, played a crucial role in saving the Old State House in Boston from demolition in the early 20th century.

James Marston Fitch, an American architectural historian and preservationist, is recognized for his pioneering work on adaptive reuse, advocating for the reuse of historic buildings for new purposes.

Jane Jacobs, an influential urban activist and writer, played a significant role in preserving historic districts in New York City, including Greenwich Village and SoHo.

Lonnie Bunch III, the founding director of the Smithsonian's National Museum of African American History and Culture, established the National Trust for Historic Preservation's African American Cultural Heritage Action Fund.

Ogden Codman, an American architect and decorator, played a significant role in the restoration of the White House during the early 20th century.

Henry Holiday, an English artist and stained-glass designer, founded the Victorian Society in 1897 to promote the appreciation and preservation of Victorian architecture.

Elizabeth O'Neill Verner, a preservationist and historian, played a crucial role in the preservation of historic sites in Charleston, South Carolina, including the Old City Market.

Patrick Geddes, a Scottish biologist and town planner, founded the National Trust for Scotland in 1931 to protect the nation's cultural and natural heritage.

Preservation Hall, a music venue and cultural center in New Orleans, has played a significant role in preserving and promoting the city's rich musical heritage.

Margaret Angus, a Canadian conservationist and philanthropist, founded the National Trust for Canada in 1973 to protect the country's natural and cultural heritage.

André Le Nôtre, a French landscape architect, played a significant role in the restoration of the Palace of Versailles, creating its iconic gardens and fountains.

James Marston Fitch, an American architectural historian and preservationist, is recognized for his pioneering work on adaptive reuse, advocating for the reuse of historic buildings for new purposes.