During the High Middle Ages the area around Oberurnen was owned by Schänis Abbey and paid taxes to Säckingen Abbey. In 1264 the Habsburgs inherited the bailiwick of Glarus from the Counts of Kyburg. About two decades later, in 1288, Säckingen Abbey granted them a fief over the abbey's lands as well. To consolidate their control over Glarus, the Habsburgs built Näfels Castle and probably also built or expanded Vorburg. By about 1300 the castle was a Habsburg administrative center. In the mid-14th century it was the residence of the Austrian Habsburg Vogt Hermann von Landenberg. In 1351 Glarus rebelled against the Habsburgs and attacked and destroyed Näfels Castle. They may have also attacked Vorburg, though there are no surviving records of the this. The castle was probably expanded after the destruction of Näfels, either by the Habsburgs or Glarus. In 1369 it appears in a document when a Rudolf Stucki pledged the castle as collateral. In 1386 it was mentioned as a refuge castle and was probably not regularly inhabited. In the 15th century it was abandoned and fell into ruin. Many of the stones show evidence of a large fire in the castle, but whether it was an accident or due to an attack is unknown.
The north west wall of the tower was repaired and preserved during the 19th century. In 1940 the south ring wall was excavated and stabilized. An archeological excavation in 1970 discovered traces of an outbuilding as well as a layer of animal bones.
The ruins sit on a hill north of the village of Oberurnen. The palas was a rectangle of 18 m × 21 m with walls that are about 2 m thick. The walls are made of roughly finished and squared limestone blocks with more carefully finished bossage stones at the corners. A newer wall connects the palas with a residential wing on the eastern side. South and west of the palas, a narrow zwinger and two ditches protected the castle. Traces of the foundations of a bridge over the north side of the inner ditch are still visible. The gatehouse was probably on the north side of the ring wall. The palas was probably built at the end of the 13th century, while the ring wall, zwinger and other out buildings are from the early 14th.References:
Château de Falaise is best known as a castle, where William the Conqueror, the son of Duke Robert of Normandy, was born in about 1028. William went on to conquer England and become king and possession of the castle descended through his heirs until the 13th century when it was captured by King Philip II of France. Possession of the castle changed hands several times during the Hundred Years' War. The castle was deserted during the 17th century. Since 1840 it has been protected as a monument historique.
The castle (12th–13th century), which overlooks the town from a high crag, was formerly the seat of the Dukes of Normandy. The construction was started on the site of an earlier castle in 1123 by Henry I of England, with the 'large keep' (grand donjon). Later was added the 'small keep' (petit donjon). The tower built in the first quarter of the 12th century contained a hall, chapel, and a room for the lord, but no small rooms for a complicated household arrangement; in this way, it was similar to towers at Corfe, Norwich, and Portchester, all in England. In 1202 Arthur I, Duke of Brittany was King John of England's nephew, was imprisoned in Falaise castle's keep. According to contemporaneous chronicler Ralph of Coggeshall, John ordered two of his servants to mutilate the duke. Hugh de Burgh was in charge of guarding Arthur and refused to let him be mutilated, but to demoralise Arthur's supporters was to announce his death. The circumstances of Arthur's death are unclear, though he probably died in 1203.
In about 1207, after having conquered Normandy, Philip II Augustus ordered the building of a new cylindrical keep. It was later named the Talbot Tower (Tour Talbot) after the English commander responsible for its repair during the Hundred Years' War. It is a tall round tower, similar design to the towers built at Gisors and the medieval Louvre.Possession of the castle changed hands several times during the Hundred Years' War. The castle was deserted during the 17th century. Since 1840, Château de Falaise has been recognised as a monument historique by the French Ministry of Culture.
A programme of restoration was carried out between 1870 and 1874. The castle suffered due to bombardment during the Second World War in the battle for the Falaise pocket in 1944, but the three keeps were unscathed.