Frank Miles Day

Frank Miles Day (April 5, 1861 – June 15, 1918) was an American architect who designed several buildings in Philadelphia, including the Art Club of Philadelphia, the American Baptist Publication Building, and the Wetherill mansion.

Outside of Philadelphia, he also designed several buildings for universities, including those at Cornell University, Johns Hopkins University, New York University, Pennsylvania State University, Princeton University, University of Colorado, University of Delaware, University of Pennsylvania, and Yale University. His university buildings were not designed in the Gothic Revival, Georgian Revival, and Collegiate Gothic, which were then frequently used.

He founded the architectural firm Frank Miles Day & Bro. with his brother and added Charles Zeller Klauder to create the firms Day Bros. & Klauder and Day & Klauder. He lectured on architecture at the University of Pennsylvania from 1890 to 1904. He taught at the Pennsylvania Academy of the Fine Arts, the Pennsylvania Museum and School of Industrial Art, and was a visiting lecturer at Harvard University. He served twice as the president of the American Institute of Architects and was the co-founding editor of House and Garden magazine.