Maruoka Castle, located in Maruoka town, Fukui pref, is the oldest standing castle with a remaining donjon. The castle, built with an old style stone wall that uses natural found stones, is rather small but has a simple beauty that remains unchanged to this day. The castle was built in 1576 by the order of Katsuie Shibata who was awarded the Echizen territory, now a part of Fukui pref., by Nobunaga Oda, who ruled a vast area of Japan in the Sengoku Period. The castle was built originally in Toyohara town, however, for more convenient road access, it was moved to Maruoka by Katsuie’s nephew, Katsutoyo.  The castle employs a unique architectural method. It is three stories high with two layers of roof and there is a watch tower with handrails going around the donjon on the top story. The castle was roofed with Shakudani stone, a local stone, and has thick lattices and black wooden walls, which are unmistakable characteristics of the early style of castle making. The castle has lived through many war-torn periods of deadly strife and carnage. The castle is also known as Kasumiga Joh, Mist Castle, owing to a legend that, at a time of battle, a giant serpent appeared and blew mist over the castle and concealed it from attackers. In 1934, it was designated as a National Treasure. It was destroyed by an earthquake, then later reconstructed and was designated an Important National Property.