Louis Isadore Kahn (1901-1974) was a prominent 20th-century architect known for his monumental and innovative designs. Born in Pärnu, Estonia, Kahn immigrated to the United States as a child. He studied architecture at the University of Pennsylvania, graduating in 1924. Kahn's career was marked by a deep philosophical approach to architecture, emphasizing the interplay of light and space, and the importance of materials and structure. He taught at Yale University and the University of Pennsylvania, influencing a generation of architects. Despite his success, Kahn led a complex personal life, fathering three children with three different women. He died of a heart attack in 1974, leaving behind a legacy of influential works.