Union Square is a 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 that surrounds 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. Today, this one-block plaza and surrounding area is one of the largest collections of department stores, upscale boutiques, gift shops, art galleries, and beauty salons in the United States, making Union Square a major tourist destination and a well-known gathering place in downtown San Francisco. Grand hotels and small inns, as well as repertory, off-Broadway, and single-act theaters also contribute to the area's dynamic, 24-hour character. The Dewey Monument is at the center of Union Square. It is a statue of Nike, the ancient Greek goddess of victory. History Union Square was originally a tall sand dune, and the square was later set aside to be made into a public park in 1850. Union Square got its name from the pro-Union rallies held there on the eve of the Civil War. The monument itself is also a tribute to the sailors of the United States Navy. 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. Since then the plaza has undergone many notable changes, one of the most significant happening in 1903 with the dedication of a tall monument to Admiral George Dewey's victory at the Battle of Manila Bay during the Spanish–American War. It also commemorates U.S. President William McKinley, who had been recently assassinated. Executed by Robert Aitken, the statue at the top of the monument, "Victory," was modeled after a voluptuous Danish-American stenographer and artist's model, Alma de Bretteville, who eventually married one of San Francisco's richest citizens. 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. During the late 1970s, and through the 1980s and 1990s,