Situated on a 1,000-foot slope that overlooks Lake Cayuga in Ithaca, the museum was designed by I.M. Pei and John L. Sullivan, with additional help from the firm Pei Cobb Freed & Partners. Totalling 61,000 square feet, the museum has nine stacked floors which house the exhibition spaces.  Photo 4 of 12 in 10 I.M. Pei Buildings We Love