Ardtole was formerly the Parish Church of Ardglass and is dedicated to St Nicholas, the patron saint of sailors. The structure is of a characteristic Anglo-Irish parish church of the Middle Ages. The long narrow church seems largely of 15th century date, with a huge east window and opposed north and south doors, one with a draw-bar hole. In 1791 a cross-decorated slab of the Early Christian period was found, showing that perhaps the site has a longer tradition than the surviving remains would suggest. A souterrain was also found south of the church. The early cross slab, now built into the Roman Catholic church at Chapeltown, and the souterrain, suggest Early Christian activity on the hilltop.
The Church sat halfway between the Anglo-Norman settlers and traders of Ardglass and the native Irish of the surrounding area, but was used by both sets of people until the 15th or 16th century. According to tradition some people from Ardglass found the chieftain of the MacCartans in a drunken sleep and fastened his hair to some briars. He avenged this affront with a massacre of the townsmen gathered together for mass in Ardtole Church. This disaster led to the abandonment of the building as a place of worship for Ardglass, probably in the 16th century.
References:The Broch of Clickimin is a large and well preserved, though somewhat restored broch near Lerwick. Originally built on an island in Clickimin Loch (now increased in size by silting and drainage), it was approached by a stone causeway. The water-level in the loch was reduced in 1874, leaving the broch high and dry. The broch is situated within a walled enclosure and, unusually for brochs, features a large 'blockhouse' between the opening in the enclosure and the broch itself. Another unusual feature is a stone slab featuring sculptured footprints, located in the causeway which approached the site. Situated across the loch is the Clickimin Leisure Centre.