St Silin's Church is a parish church in Llansilin. The present building, which has parts dating back to the 13th century, is a Grade I listed building. It stands on a site that has been used by Christian communities since the Dark Ages. The church is dedicated to Saint Silin, now better known as Saint Sulien, the 6th-century founder-abbot of a monastery at Luxulyan in Cornwall.
The church was constructed out of wood in a cruciform shape as a Clas, though it was damaged during Owain Glyndŵr's rebellion and the nave was rebuilt in stone. A 13th-century lancet remains a part of the current building. During the English Civil War, Oliver Cromwell's Roundheads used the church as a barracks and the south door for target practice with muskets. It was also shot at by Royalist forces sieging the church; the door is still in use and still retains the bullet holes. The wooden spire of the church burned down in the 1800s and a replacement stone tower was built in 1832.
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.