William R. Griffith House, also known as Cathedral House and Cathedral House of St. Stephen`s Episcopal Cathedral, is a historic home located at Harrisburg, Dauphin County, Pennsylvania. It was built between 1840 and 1843, and is a three-story, three-bay wide brick dwelling in the Greek Revival style. The front block measures 28 feet by 40 feet, with a narrower rear block measuring 15 feet by 50 feet. It features a front portico with freestanding Ionic order columns. It was added to the National Register of Historic Places in 1976.