Elmstein Castle was built in the 12th century as a Palatine castle in order to guard the route through the valley. The feoffees held the title of Schenk, a German aristocratic title that originally meant cup bearer. The castle occupied by the Electorate of the Palatinate. Between 1220 and 1230, the lower curtain wall was built. Emperor Louis IV of Bavaria ceded the castle to his cousin, the Count Palatine. From 1419 to 1437, the castle was occupied by Count John V of Sponheim. In 1466, the castle was enfeoffed by Frederick I the Elector, to Erhard of Remchingen. In 1513, in the course of changes of ownership, Henry of Pagk was given the castle as a fief. During the German Peasants' War in 1525 the castle was damaged. Count Palatine John Casimir inherited the castle in 1576. The castle was also damaged during the Thirty Years' War in 1648. In 1689, during the War of the Palatine Succession, the castle fell into a permanent state of disrepair. Since then, the castle has been in private ownership.
The remains of the parts of the original curtain walls, the palas and the shield wall are still able to be seen today.
References:Château de Niort is a medieval castle in the French town of Niort. It consists of two square towers, linked by a 15th-century building and dominates the Sèvre Niortaise valley.
The two donjons are the only remaining part of the castle. The castle was started by Henry II Plantagenet in the 12th century and completed by Richard the Lionheart. It was defended by a rectangular curtain wall and was damaged during the Wars of Religion. In the 18th century, the castle served as a prison.
The present keeps were the central point of a massive fortress. The southern keep is 28m tall, reinforced with turrets. The northern tower is slightly shorter at 23m. Both are flanked with circular turrets at the corners as well as semicircular buttresses. Each of the towers has a spiral staircase serving the upper floors. The Romanesque architecture is of a high quality with the dressed stones closely jointed.