Dedicated on September 6, 1890. The footprint of the School's original building property established a main entrance on the frontage of North Broad Street. The buildings' length was 140 feet and extended eastward on Vine Street for 115 feet bordered on the north with the very narrow Pearl Street and bounded eastward by a ten foot wide alley commonly known as Watts Street, rededicated to the school. The land was formerly a Railroad Depot that was moved just north to Cahowhill Street. The exterior is a three-story building of Victorian Gothic design, faced with "Lee, Massachusetts" marble (the same as selected for Philadelphia City Hall), placed on a granite base (quarried from Conshohocken, Pennsylvania) and sited to impact majestically at the intersection by prominent architect Edwin Forrest Durang. The building has two ornamental stone facades along Vine and Broad Streets joined at a square corner tower and two brick facades at the rear of the building. The building originally had a 150-foot marble tower topped in copper at the corner of Board and Vine, which was destroyed by fire in 1959 and not replaced.