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Created page with "==History and Development== Union Square, located in the heart of San Francisco, California, is a prominent public plaza and a major commercial and cultural hub. Its history dates back to 1850 when it was designated as a public square by the city's first mayor, John Geary. The square was named to commemorate the pro-Union rallies held there on the eve of the American Civil War. Over the years, Union Square has evolved from a simple gathering place into a bustlin..."