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:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.