FontHill Castle was Henry Chapman Mercer's unique & self-designed home, made of poured concrete. He designed 2 other unique structures in Doylestown, PA: Moravian Pottery and Tile works (in this gallery: http://annalisa.smugmug.com/Travel/Pennsylvania/Moravian-Pottery-Tile-Works/14182051_LDhz8 ) and Mercer Museum. FontHill was completed in 1908 and contains 3 main architectural styles.