The bells were stolen in 1654 by a Lieut.-Col. Beale, during the Irish Confederate Wars.[7] Divine Service was performed at St. Mary's until 1811 or 1812, when the west aisle was demolished to make room for the modern church.
Many stories are associated locally with the ruins, including one about a soldier who entered the "Black Hole" under an archway with his dog; only the dog returned. In another, a man who attempted to take the cross out of the old chancel had his brains dashed out.[8]
There are three lancet windows in the east gable. The old chancel and the north and south transepts contain one of Ireland's largest collections of medieval funerary. One features a cross with Lamb of God, symbolism associated with the Knights Templar. Another rarity is a woman buried next to both of her husbands, a rarity in the Middle Ages.[9][10][11]