The monastery at Kildonan was founded by a missionary St. Donnan, possibly from either Dal Riata or an Irish Kingdom. He and his monks were massacred in 617 by the local Pictish queen. In medieval times the island was held by Clan Donald. The church which currently houses the alleged sheela sculpture is thought to be a 16th century construction but there is evidence of earlier religious settlement in four cross slabs which date from the early medieval period. Records also list a religous settlement here in 725 so it would seem that the monastery continued after St Donan’s death.
References:
The Château du Haut-Koenigsbourg is situated in a strategic area on a rocky spur overlooking the Upper Rhine Plain, it was used by successive powers from the Middle Ages until the Thirty Years' War when it was abandoned. From 1900 to 1908 it was rebuilt at the behest of the German kaiser Wilhelm II. Today it is a major tourist site, attracting more than 500,000 visitors a year.
The first records of a castle built by the Hohenstaufens date back to 1147. The fortress changed its name to Koenigsburg (royal castle) around 1157. The castle was handed over to the Tiersteins by the Habsburgs following its destruction in 1462. They rebuilt and enlarged it, installing a defensive system designed to withstand artillery fire.
The fortification work accomplished over the 15th century did not suffice to keep the Swedish artillery at bay during the Thirty Years War, and the defences were overrun.