Fonthill (house)
 Fonthill also known as Fonthill Castle was the home of the American archeologist and tile maker Henry Chapman Mercer in Doylestown Pennsylvania. Built between 1908 and 1912 it is an early example of poured-in-place concrete and features 44 rooms over 200 windows 18 fireplaces and 10 bathrooms. The home was individually listed on the National Register of Historic Places in 1972.