Longues Abbey, Benedictine abbey in Longues-sur-Mer, France.

Longues Abbey is a former Benedictine monastery in Longues-sur-Mer, Calvados, founded in 1168 by Hugh Wac. Its roofless abbey church, built of pale grey and tan stone, has a tall pointed gable with a large pointed-arch recess and three pointed arches below; a lower section to the right has tall narrow pointed windows. The conventual buildings, now partly restored, include a guesthouse whose roof structure was dated to the medieval period.

Founded in 1168, the abbey received support from King Henry II of England and Norman nobility. This patronage from powerful figures helped establish and sustain the religious community through medieval times.

The abbey holds one of the largest collections of glazed floor tiles of any Norman monument; they came from the Molay workshop and were made in the late 13th or 14th century. In a small chapel among the graves of the d'Argouges lords stands the tomb of Jacques d'Argouges, who died on 6 September 1510. A statue of Saint James the Great and a wall painting of the former abbot's lodging can also be seen.

The site is accessible by car with plenty of space to explore the buildings and gardens at your own pace. Wear comfortable shoes since you will walk through outdoor areas to see the various structures.

Restoration work uncovered the oldest Armorican-style timber framing in Normandy, confirmed by scientific research. This construction technique offers insights into medieval building methods and regional architectural traditions.