Costas Kondylis, born in 1940, is an architect as well as the founder and senior partner of Costas Kondylis and Partners architecture firm, which has designed dozens of residential and commercial buildings in New York City. He has a reputation for staying within budget and delivering work on schedule, but critics have dismissed his designs as formulaic. Kondylis, who grew up in Greece, is a frequent collaborator of developer Donald Trump. His portfolio includes the 72-story, 856-foot Trump World Tower at 845 United Nations Plaza, which briefly held the title of worlds tallest residential building, the Trump International Hotel and Tower at Columbus Circle, and some of the buildings that made up the Trump Place complex on the Upper West Side of Manhattan. Other developers who have hired him include Larry Silverstein, Bruce Ratner, and Joseph Moinian. He attended the University of Geneva School of Architecture. Kondylis sits on the board of the Samuel Waxman Cancer Research Foundation, in memory of his late wife, who died of breast cancer.