St Mary's Church, at the centre of the walled town, is the parish church of Conwy and one of the oldest buildings within the walls. It stands on the site of the Cistercian abbey that occupied this ground before Edward I cleared it in the 1280s to build his castle and fortified town — the monks were relocated to Maenan, some miles up the valley.
The present building is mostly 14th and 15th century, with some later additions. The interior is quiet and worth a few minutes of your time: the carved choir stalls, the medieval font, and the tomb effigies give a sense of the town's long continuity beneath the better-known medieval drama of the castle. The churchyard, with its old table tombs and views of the surrounding rooftops, is a peaceful spot in the middle of the tourist circuit.