101 Second Street is an office tower located in the South of Market district in San Francisco, California on Mission Street. The 108 m building was completed in 2000 and has 26 floors with 388,000 sq ft for offices. It is known for its glass-clad, four-story atrium which functions as public space. Its art pavilion has included commissions by painter Charles Arnoldi and sculptor Larry Bell. On warm days, the building at street level is opened.