Corcomroe Abbey is a 13th-century Cistercian abbey ruin in the northern Burren region of County Clare, Ireland. The abbey is known for its refined stonework and its picturesque location in a fertile valley. The current church ruin dates from between 1210 and 1225.
Corcomroe is the only Irish abbey where remnants of medieval blueprints are still visible, incised into the plaster layer of the walls.
The abbey was founded around 1194-1195 by Donal Mór O'Brien or his son Donal Cairbreach as a daughter house of Inisloughnaght. In 1317, a bloody battle took place near the abbey between rival O'Brien clans. After the dissolution of the monasteries around 1544, the grounds came into the hands of the Earls of Thomond. Although most of the residential buildings have disappeared, the church ruin is largely intact. The surrounding cemetery is still in use by local families.