Summers (31 July 1928 in San Antonio, Texas – 12 December 2011 in Sebastopol, California) was an American modernist architect.
Considered to have been Mies Van Der Rohe's "right-hand man, he assisted his famed employer in the design of the iconic Seagram Building on Park Avenue on the island of Manhattan in New York City.
Later, in private practice, he designed the huge McCormick Place convention center in Chicago, Illinois.