prominent British architect known for his sleek, modern buildings made of steel and glass.

Foster was trained at the University of Manchester (1956–61) in England and Yale University (1961–62) in New Haven, Connecticut. Beginning in 1963 he worked in partnership with Richard and Su Rogers and his wife, Wendy Foster, in a firm called Team 4. In 1967 he established his own firm called Foster Associates (later Foster + Partners). Foster's earliest works explored the idea of a technologically advanced “shed,” meaning a structure surrounded by a lightweight shell or envelope.

Foster's first buildings to receive international acclaim were the Sainsbury Centre for the Visual Arts (1974–78) in Norwich, England, a vast, airy corrugated metal shed, and the Hong Kong and Shanghai Banking Corporation (HSBC Holdings PLC) headquarters in Hong Kong (1979–86), a futuristic steel-and-glass office building with a stepped profile of three towers. In these commissions, he established himself as one of the world's leaders in high-tech design: for both buildings he had ingeniously moved elements such as elevators to the exterior of the building, where they could be easily serviced, and thus created open plans in the centre of the spaces. Balancing out this high-tech character, many of Foster's buildings, including his Hong Kong office and the Commerzbank (Commerzbank AG) (1991–97) in Frankfurt, utilized green spaces, or mini-atria, and were designed to allow a maximum amount of natural light into the offices. In this way, Foster created a more fluid relationship between inside and outside spaces and strove to impart a sense of humanity into an otherwise futuristic office environment.

The recipient of numerous awards for his work—including the Pritzker Prize (1999), the Japan Art Association's Praemium Imperiale prize for architecture (2002), and the Aga Khan Award (2007) for his design of the Petronas University of Technology in Malaysia—Foster was knighted in 1990 and granted a life peerage in 1999.