The ruins which stand near the water are those of a Franciscan friary, founded in the mid-15C. The cloisters date from the end of that period. Although part of the original plan, the six-storey tower was not added until later on. The south side of th..

The well-preserved remains by the Rosserk River belong to the first abbey built by a Franciscan community in Ireland (mid-15C). The church is beautifully decorated with its finely carved west door, east window, south transept window and a carved pisc..

The current Anglican cathedral was built in 1670 by Thomas Ottway, Bishop of Killala, using rubble and stones from the ruined medieval cathedral - south doorway and the eastern gothic window. In the graveyard there is a 12C round church tower (25m hi..