Down an allee of ancient trees in Bucks County lies a ancient looking fairytale arts and crafts castle. This is the last thing you would expect to find in rural Pennsylvania, more fitted to the English countryside perhaps.More bizarre however is the material: concrete. Much like his museum, the Mercer, Henry Chapman Mercer built his own house between 1908 and 1912 out of this versatile material. While not quite to the extent as the museum, the house still incorporates concrete in the roofs (mostly covered in clay tiles made at the adjacent factory), dormers, chimneys, floors, walls and ceilings. Light was Mercer's key concern. Over 200 windows were incorporated into the facade in all shapes and sizes: Most are operable. As a testament to the design, even on cloudy days candlelight (or electric lights) are barely needed unlike the castle's European precedents.The house is truly quirky and enchanting. As it's the brainchild of Mercer, I would expect him to be a fascinating character as well: I'd love to pick his brain over a meal!Color is greatly incorporated into the building, unlike his later museum. While most of the interior pastel colors have faded over the years (another testament to the amount of light received) the window sills and doors are still vibrant shades of red and yellow.