Helmut Jahn (born January 4, 1940) is a Chicago-based German-American architect, known for designs such as the Sony Center on the Potsdamer Platz in Berlin, Germany; the Messeturm in Frankfurt, Germany; the One Liberty Place in Philadelphia, Pennsylvania (formerly the tallest building in Philadelphia); and the Suvarnabhumi Airport, an international airport in Bangkok, Thailand. Recent projects include a residential tower in New York City, 50 West St in 2016 and the ThyssenKrupp Test Tower in Rottweil, Germany in 2017. Jahn was born Zirndorf near Nuremberg, Germany, in 1940, and grew up watching the reconstruction of the city, which had been largely destroyed by Allied bombing campaigns.[1] After attending the Technical University of Munich from 1960 to 1965, he worked with Peter C. von Seidlein for a year. In 1966, he emigrated to Chicago to further study architecture at the Illinois Institute of Technology, but left school without earning his degree.