César Pelli's tower topped out in 2017 at 1,070 feet, tallest in San Francisco. The tower has a screened architectural crown, and Jim Campbell installed 11,000 LEDs behind it: every night the crown shows abstract imagery drawn from footage recorded around San Francisco — people walking, birds, waves — so the skyline displays the city back to itself. The building sits on 42 deep, excavated load-bearing elements extending into bedrock.
Source: Council on Tall Buildings and Urban Habitat, The Skyscraper Center: Salesforce Tower; Pelli Clarke & Partners, Salesforce Tower project profile; Jim Campbell, Day for Night project description (2018); Magnusson Klemencic Associates, Salesforce Tower project profile