Sogn Parcazi castle is known after the hill that it stands on. The early chronicles of the region list Pepin, the father of Charlemagne, as the founder of the castle. While this is unlikely, it has not been conclusively disproven. Regardless of whether it is true, the first church on the site may date to the 8th century and may have been built on an even older pre-Christian cult site. It was originally built as a fortified church and refuge castle and may have been the first parish church of Tamins and Trin. In the 9th or 10th century the Emperor combined the imperial estates of Trin, Tamins and Reichenau, Switzerland into the Herrschaft of Hohentrin and granted it to Reichenau Abbey. Over the following centuries the complex was expanded and gradually converted into a feudal castle. The first residential building on the site was built in the 11th or 12th century when a tower was added. The palas on the northern end was probably built around 1300.
The castle first appears in historical records in the early 14th century. In 1314 the Herrschaft of Hohentrins passed from Reichenau Abbey to the Freiherr von Frauenberg. By 1325 it was owned by Count Hugo III von Werdenberg-Heiligenberg. In 1360 there was a fight between the local minor nobility and the Werdenberg-Heiligenberg and Werdenberg-Sargans families, but nothing is recorded as happening to Sogn Parcazi. At some point in the next two decades the castle was given as collateral to Ulrich Brun von Rhäzüns, because in 1383 Hugo and Heinrich von Werdenberg-Heiligenberg had to repay Ulrich Brun. In 1398 they pawned the castle again, this time to Albrecht von Werdenberg-Bludenz who was a supporter of the Habsburgs. However, a few months later Rudolf and Heinrich von Werdenberg-Heiligenberg as the owners of the castle joined the anti-Habsburg Grey League.
In 1428 the last male member of the Werdenberg-Heiligenberg family, Hugo, died and the castle and herrschaft passed to Peter von Hewen. The von Hewen family appointed vogts to administer the castle and lands for them. The last vogt at Sogn Parcazi was the Vogt Otto Capol. On 2 July 1470 he and his wife traveled to Reichnau for a celebration. While they were gone a fire broke out in the castle, destroying it and killing three of the vogt's children and their maid. One theory is that the fire was set by debtors who owed the vogt money in order to destroy the documents recording their loans. The castle was never rebuilt and Vogt Capol received a title in Lugnez. Later records continue to record that there were vogts over Hohentrins until 1524, but it is unknown whether they lived at Canaschal Castle or in the village. The herrschaft went to Johann von Planta in 1568, followed by Wolfgang von Löwenstein-Wertheim in 1583 and the Lords of Schauenstein in 1585. In 1616 the municipality of Trin bought their freedom from the Schauenstein family.
The castle was partly excavated in 1931 but the conservation project ran out of money and some of the excavated walls collapsed. During World War II the Swiss Army took over Sogn Parcazi and built two bunkers on the hill. After the war, the army remained responsible for the ruins and in 1964 they were re-excavated, repaired and reinforced. The ruins were turned over to the municipality in 2004 and from 2006 until 2010 they were again repaired and an archeological excavation revealed much of the castle's history.
The ruins of the castle are located on a steep hill west of Trin village. The ruins of the Church of St. Pancras are located in the center of the 50 by 80 meters flat top of the hill. The simple church building is oriented along an approximate east-west axis. It dates from about 1100 and may have replaced an earlier church. A rectangular cistern or baptistery was added in the 12th century. The 11th or 12th century tower south of the tower is 11 m × 7 m with walls that are up to 1.8 m thick. The palas to the north was added in the 13th century and is 18 m long.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.