Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Q: Lever House, designed by Gordon Bunshaft and Natalie de Blois (design coordinator) of Skidmore, Owings and Merrill and located at 390 Park Avenue in Midtown Manhattan, New York City, is a seminal glass-box skyscraper built in the International Style according to the design principles of Ludwig Mies van der Rohe.
A:
Who was the architect or designer of Lever House?