Ieoh Ming Pei (born April 26, 1917), commonly known as I. M. Pei, is a Chinese American architect often called a master of modern architecture. Born in Canton (Guangzhou) and raised in Hong Kong and Shanghai, Pei drew inspiration at an early age from the gardens at Suzhou. In 1935, he moved to the United States and enrolled in the University of Pennsylvania's architecture school, but quickly transferred to the Massachusetts Institute of Technology. He was unhappy with the focus at both schools on Beaux-Arts architecture, and spent his free time researching emerging architects, especially Le Corbusier. After graduating, he joined the Harvard Graduate School of Design (GSD) and became friends with the Bauhaus architects Walter Gropius and Marcel Breuer. In 1939, he married Eileen Loo, who had introduced him to the GSD community. They have been married for over seventy years, and have four children, including architects C.C. "Didi" Pei and L.C. "Sandi" Pei.

Pei spent ten years working with New York real estate magnate William Zeckendorf before establishing his own independent design firm that eventually became Pei Cobb Freed & Partners. Among the early projects on which Pei took the lead were the L'Enfant Plaza Hotel in Washington, DC and the Green Building at MIT. His first major recognition came with the National Center for Atmospheric Research in Colorado; his new stature led to his selection as chief architect for the John F. Kennedy Library in Massachusetts. He went on to design Dallas City Hall and the East Building of the National Gallery of Art.