Glasgow Cathedral is the oldest cathedral on mainland Scotland and is the oldest building in Glasgow. The history of the cathedral is linked with that of the city, and is allegedly located where the patron saint of Glasgow, Saint Mungo, built his church. The tomb of the saint is in the lower crypt. Walter Scott's novel Rob Roy gives an account of the kirk.
Built before the Reformation from the late 12th century onwards and serving as the seat of the Bishop and later the Archbishop of Glasgow, the building is a superb example of Scottish Gothic architecture. It is also one of the few Scottish medieval churches (and the only medieval cathedral on the Scottish mainland) to have survived the Reformation not unroofed.
James IV ratified the treaty of Perpetual Peace with England at the high altar on 10 December 1502. The cathedral and the nearby castle played a part in the battles of Glasgow in 1544 and 1560. Twenty years after the Reformation, on 22 April 1581 James VI granted the income from a number of lands to Glasgow town for the kirk's upkeep. He traced the ownership of these lands to money left by Archbishop Gavin Dunbar as a legacy for repairing the cathedral. The town council agreed on 27 February 1583 to take responsibility for repairing the kirk, while recording they had no obligation to do so. The church survives because of this resolution. Inside, the rood screen is also a very rare survivor in Scottish churches.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.