Loughinisland churches, off Drumgooland Road, Tievendarragh, near Loughinisland, Downpatrick, Co Down

Three small rectangular churches in rubble construction with gabled roofs, built at various dates between the 13th and 17th centuries. The ruins stand on a small island to the east side of Loughinisland Lake, approached by a relatively recent causeway, and are now in state care. The buildings are surrounded by a graveyard, with the earliest discernible headstone dating from 1758.

The largest church, measuring approximately 20 metres by 8.5 metres, stands to the north and dates from around 1450. Much of its north and south walls and gables remain standing. The west gable contains a doorway opening with a smaller doorway to the south. Small window openings are present to the north and south, with a larger window opening in the east gable. A small lancet opening sits above the doorway in the west gable.

The middle church, considerably smaller at approximately 11.5 metres by 6.5 metres, dates from the 1200s. It has lost much of its east and west gables. A doorway opens to the south, with small window openings to the north and south, and what may have been a larger opening to the east.

The smallest church, measuring approximately 7.5 metres by 5.5 metres, dates from around 1636 and was built by the local Lord Phelim MacCartan. It features a semicircular arched doorway with moulded jambs and spandrel panels. The left panel bears the initials P.M.C., and the right panel bears the date 1636, though this is now difficult to discern. The east gable contains a small window with double pointed arch lights, now lacking their mullion, with smaller single-light windows to the north and south.

A church is recorded on this site in the 1306 papal taxation returns under the name "Lerkes", believed to be the middle church. Around 1450, the much larger northern church was erected, probably to replace the older structure. In 1636, Phelim MacCartan built the smaller southern church. The northern church remained in use by all denominations into the early 1700s, with Catholic Mass celebrated first each Sunday, followed by the Church of Ireland service. Around 1720, during a particularly wet Sunday, the Catholic congregation sheltered in the church after Mass, preventing their Protestant counterparts from entering. This angered members of the Forde family, who subsequently had the old church largely dismantled, using its roof timbers for the new Protestant church at Seaforde.