The church of St. Mary and All Saints in Conwy was erected as a temple of Aberconwy Abbey, a Cistercian foundation from 1186-1197. It was the burial place of many princes of Gwynedd, including Gruffydd ap Cynan, Llewelyn ap Maelgwyn, Llywelyn the Great and his sons. Only after the English conquest in 1283 it became a parish church, when the abbey was transferred to Maenan, 12 km to the south. As in most Welsh and English churches, its thorough renovation was carried out in the nineteenth century.
From the end of the thirteenth century, the church consisted of a three-nave corpus, a shorter chancel ended with a straight wall from the east with buttresses, sacristy on the north side and a tower added on the western side of the temple. In the 14th century, the southern transept and the north and south porch were added. The room north of the tower then served as a charnel house (mortuary). In the fifteenth century, the tower was finally finished and beautiful rood screen, preserved to this day, was installed inside the temple. In the sixteenth century, the roofs of the side aisles were raised.
Wooding J., Yates N., A Guide to the churches and chapels of Wales, Cardiff 2011.
Website coflein.gov.uk, St Mary and All Saints church Conwy, Formarly Aberconwy Abbey.
Website wikipedia.org, Church of St Mary & All Saints, Conwy.