The fashion for Greek Revival was ending when Stewart used the Corinthian order for the last important Episcopal church east of Broad Street. Where Haviland had relied on wood for the columns of St. Andrew's Episcopal Church (
PH40), Stewart made the shift to the industrial age's new material—cast iron—for the great portico colonnade. As the 1830s ended, the Greek Revival had lost its purity, leading Stewart to offer a crowning steeple atop the pediment for significantly higher costs. The congregation chose the lower-priced design. The church's dual name reflects its merger with the Epiphany Church that stood on Chestnut Street west of 15th Street. The parish house addition of 1875 by Furness is memorable for its splendid Néo-Grec marble and iron stair.