Robert von Ezdorf (August 15, 1889 – March 26, 1956) was an American architect and composer. He specialized in high-rise office buildings and also designed the interiors of the Commodore Hotel, the Waldorf-Astoria and Hotel Hershey as well as the Wharton School of the University of Pennsylvania. He worked for the firm of Cross and Cross where he served as chief designer. He also worked at McKim, Mead, and White. Von Ezdorf also designed much of Oak Ridge's Secret City, including the reactor used in developing the atomic bomb.