[1] The castle is known as Crap Sogn Parcazi (Romansh: The Rock of St. Pancras) after the hill that it stands on.

[2] The early chronicles of the region list Pepin, the father of Charlemagne, as the founder of the castle.

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.

However, a few months later Rudolf and Heinrich von Werdenberg-Heiligenberg as the owners of the castle joined the anti-Habsburg Grey League.

[3] In 1428 the last male member of the Werdenberg-Heiligenberg family, Hugo, died and the castle and herrschaft passed to Peter von Hewen.

One theory is that the fire was set by debtors who owed the vogt money in order to destroy the documents recording their loans.

During World War II the Swiss Army took over Sogn Parcazi and built two bunkers on the hill.

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.