Helmut Jahn

Helmut Jahn (January 4, 1940 – May 8, 2021) was a German-American architect from Chicago, Illinois. He was born in Nuremberg, Germany.
Jahn was well 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 Thyssenkrup Test Tower in Rottweil, Germany in 2017. He was designing the 1000M, a super-tall residential complex in Chicago at the time of his death.
Jahn was riding his bicycle on May 8, 2021 and was hit by a car in Campton Hills, Illinois. He died from his injuries a few hours later, aged 81.