Figure 2. Top Left. The first Philadelphia headquarters for the college were located in the Covington Hotel (no longer standing), 37th Street above Chestnut Street. Top Right. The second Philadelphia headquarters were located in what was then known as the Integrity Trust Building, the northeast corner of 36th and Walnut Streets, adjacent to the campus of the University of Pennsylvania. Source: Morgan WG. American College of Physicians: Its First Quarter Century. Philadelphia: American College of Physicians; 1940. Bottom Left. The first permanent College Headquarters, 4200 Pine Street, Philadelphia, 1936-1989. At right is the historic Eisenlohr Mansion (1905), purchased by the College in 1936; the center wing was added in 1961; destroyed by fire and rebuilt in 1966; the last wing (left) was added in 1971, on the site of a one-time mid-19th century residence occupied by the Group Insurance Administrators affiliated with the College. Source: Archives of the American College of Physicians. Bottom Right. The current headquarters, completed in 1989, on Independence Mall West, Sixth Street at Race in Philadelphia. Source: Department of News and Information, American College of Physicians.