2523 20TH ST.
Colonial Revival
The houses on this block are the largest in the Estate, consisting of three full stories with attic. This house is a variation on the Colonial Revival harking back to 18th-century Philadelphia traditions. Like the farmhouses of colonial Pennsylvania, the walls are entirely sheathed in rough-hewn stone, the locally quarried Wissahickon schist characterized by sparkling flecks of mica. The gambrel roof, best seen from the side, is tiled in gray slate. Elements of Georgian sophistication are the full-height columns supporting the porch roof, the turned balusters of the porch railing and the modillions under the eaves.