Frank Heyling Furness (November 12, 1839 – June 27, 1912) was an American architect of the Victorian era. He designed more than 600 buildings, most in the Philadelphia area, and is remembered for his diverse, muscular, often inordinately scaled buildings, and for his influence on the Chicago-based architect Louis Sullivan. Furness also received a Medal of Honor for bravery during the Civil War. He worked with custom furniture maker Daniel Pabst.
The son of abolitionist William Henry Furness, Shakespearean scholar Horace Howard Furness was his brother. Toward the end of his life, his bold style fell out of fashion, and many of his significant works were demolished in the 20th century. Among his most important surviving buildings are the University of Pennsylvania Library, now the Fisher Fine Arts Library, the Pennsylvania Academy of the Fine Arts, and the First Unitarian Church of Philadelphia, all in Philadelphia, and the Baldwin School Residence Hall in Bryn Mawr.
