San Francisco's event and convention complex is known as the Moscone Center. It has three main halls, with two underground. These underground halls are directly below Yerba Buena Gardens. Moscone South and North are part of the three level facility, with Moscone West as the top exhibition hall on 4th Street. Moscone Center was built in 1981. The former Mayor of San Francisco, California, George Moscone was assassinated in 1978. It is one of the reasons the town decided to name the center after him.
Exhibition floor space is over 700,000 square feet, with 106 meeting rooms of more than 250,000 square feet. Construction costs were more than $300 million. The last expansion to the facility was in 2003 with Moscone West. Moscone South was the first part of the three exhibition hall center to be built, with the north hall finished in 1991.
What is rather interesting is that George Moscone opposed the development of the center. He felt too many middle class citizens would be uprooted. It is rather ironical to have the center named for him. Gatherings like MacWorld Expo, American Geophysical Union, Game Developer's Conference, and JavaOne have been held at the Moscone Center.