Although this abbey on the southern bank of Black River is in ruins, it is one of the best-preserved Franciscan monasteries in Ireland. It was probably founded in 1351 and greatly extended in 1496. The gatehouse and the enclosure date from 1572. The walls and ceiling of the church are decorated with frescoes. The beautiful and partly preserved cloisters are of great interest and there is a beautiful view from the top of the main tower.