Philadelphia's most prominent Victorian architect was Frank Furness, who designed more than 600 buildings and influenced the Chicago architect Louis Sullivan. Furness brought a bold muscularity to his works, shunned historical imitation, and was an innovator in the use of iron and glass. Among his major buildings are the Pennsylvania Academy of the Fine Arts (1876) (designed with George Hewitt), Knowlton Mansion (1882), the First Unitarian Church (1885), and the University of Pennsylvania Library (1891). Others, such as the Provident Life & Trust Company (1879), the B. & O. Railroad's 24th Street Station (1888), and the Pennsylvania Railroad's Broad Street Station (1893), were demolished in the mid-20th century.