File:Brooks Hall SF construction 1957-02-20.jpg

Brooks Hall, San Francisco's first modern convention center, under construction next to the Civic Center on February 20, 1957. It would open on April 11, 1958 and later host the first Macworld Conference & Expo in 1985.

Source

 * Construction of Mole Hall (later Brooks Hall), San Francisco Public Library. 1957-02-20.