Belmont Castle was built in the 10th or 11th century for the Freiherr von Belmont. The first recorded member of the family was Lutefridus de Belmonte in 1137/39. The Belmont family was related to a number of other Raetian noble families including the powerful von Vaz. By the 13th century they were one of the most powerful families in Graubünden. They owned castles and villages throughout the region. Konrad von Belmont was the Bishop of Chur from 1273 until 1282. In 1267 Heinrich von Belmont was the first student from Raetia to study at University of Bologna. By 1200 the Belmonts appear to have moved to another castle near Castrischand then to Tuma Casti by Domat/Ems, probably leaving a bailiff or vogt at Belmont.
In 1352 Ulrich Walter von Belmont led a successful uprising against the Counts of Werdenberg-Heiligenberg. Together with the armies of the Montalt and the Rhäzüns families they defeated a Werdenberg-Heiligenberg army at Mundaun near Ilanz. In retaliation, soon thereafter, a Werdenberg army burned Ilanz to the ground. It is unknown whether Belmont Castle was also attacked and destroyed or was bypassed, but by the late 14th century it had fallen into ruins. On 11 July 1371 Ulrich Walter von Belmont died childless and the Belmont lands were inherited by the Montalt and Sax-Misox families. In 1380 the Sax-Misox family traded the ruins of Belmont Castle as well as other lands to Brun von Rhäzüns. After the trade the castle remained abandoned and continued to disintegrate. From 1932 through 1936 the ruins were excavated and repaired.
The castle was built near the, now abandoned and vanished, Walser village of Fidaz near Flims. It was built on a rocky spire with sheer cliffs on the north and east sides. Very little is known about the construction history and layout of the castle. However, there were two semi-circular ring wall that wrapped around the east, north and north-west sides of the peak with the inner one built first followed by the outer later. The walls connected at least three buildings. The central and eastern building were probably residences. In the center of the half-circle is a 5.7 meters deep cistern. On the southern side of the castle is a smaller rocky peak that stands about 8 m above the castle and has a flat top that is about 10 m × 30 m. No stone ruins have been found on the small peak, so it was probably topped with one or more wooden buildings.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.