Thom Mayne, American architect and academic, designed the San Francisco Federal Building and Phare Tower

Thom Mayne is an American architect. He is based in Los Angeles. In 1972, Mayne helped found the Southern California Institute of Architecture (SCI-Arc), where he is a trustee and the coordinator of the Design of Cities postgraduate program. Since then he has held teaching positions at SCI-Arc, the California State Polytechnic University, Pomona and the University of California, Los Angeles (UCLA). He is principal of Morphosis Architects, an architectural firm based in Culver City, California and New York City, New York. Mayne received the Pritzker Architecture Prize in March 2005.

The San Francisco Federal Building, formally the Speaker Nancy Pelosi Federal Building, is an 18-story, 234 ft-tall (71.3 m) building at the corner of Mission and 7th streets in the South of Market neighborhood of San Francisco, California. The federal building was designed by the Morphosis architectural firm, as a supplement to the Phillip Burton Federal Building several blocks away. Thom Mayne of Morphosis designed the building using a juxtaposition of gray concrete walls, perforated metal panels, and custom, faceted wood ceilings.

The Phare Tower, in English, "Beacon Tower", was a planned approx. 300-metre (984 ft) tall skyscraper with 71 floors designed as a green building to be built in Courbevoie (Hauts-de-Seine), France, in the La Défense district of suburban Paris. The building was being designed by Los Angeles-based Morphosis, headed by architect Thom Mayne, and would have been completed in 2018. Had it been built, it would have been the tallest skyscraper in Paris and one of the tallest in the European Union. Tour Phare was cancelled and could be replaced by Sister Towers.