Historic
Union Square
Union Square is a 2.6-acre (1.1-hectare) public plaza bordered by Geary, Powell, Post, and Stockton Streets in downtown San Francisco, California. "Union Square" also refers to the central shopping, hotel, and theater district surrounding the plaza for several blocks. The area got its name because it was once used for Thomas Starr King rallies and support for the Union army during the American Civil War, earning its designation as a California Historical Landmark.
Why it's on the map
Union Square was built and dedicated by San Francisco's first American mayor John Geary in 1850 and is so named for the pro-Union rallies by Thomas Starr King that happened there before and during the United States Civil War.
Another significant change happened between 1939 and 1941 when a large underground parking garage was built under the square; this meant the plaza's lawns, shrubs and the Dewey monument were now on the garage "roof." Designed by Timothy Pflueger, it was the world's first underground parking garage.
Source: Wikipedia / Wikidata
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