Los Angeles City Hall
The building was designed by John Parkinson, John C. Austin, and Albert C. Martin, Sr., and was completed in 1928. Dedication ceremonies were held on April 26, 1928. It has 32 floors and, at 454 feet (138 m) high, is the tallest base-isolated structure in the world, having undergone a seismic retrofit that will allow the building to sustain minimal damage and remain functional after a magnitude 8.2earthquake. Showcased on tours of Los Angeles, the concrete in its tower was made with sand from each of California’s 58 counties and water from its 21 historical missions. City Hall’s distinctive tower was based on the purported shape of the Mausoleum of Maussollos, and shows the influence of the Los Angeles Public Library, completed soon before the structure was started. An image of City Hall has been on Los Angeles Police Department badges since 1940.
Due in part to seismic concerns, prior to the late 1950s the City of Los Angeles did not permit any portion of any building other than a purely decorative tower to be more than 150 feet (46 m) high. Therefore, from its completion in 1928 until 1964, the City Hall was the tallest building in Los Angeles, and shared the skyline with only a few structures having decorative towers, including the Richfield Tower and the Eastern Columbia Building.
The building was designated a Los Angeles Historic-Cultural Monument in 1976.