|Other names||Killushin, Glenn Ussen, Glenn Uissen, Glenn Uisen|
|Founder(s)||Saint Diarmait mac Siabairr|
|Important associated figures||Saint Comgán|
|Heritage designation||National Monument|
|Style||Irish monastic, Romanesque|
|Location||Killeshin, County Laois|
|Visible remains||Part of church (west and east gables; part of north elevation)|
Killeshin Church is located near Killeshin village, on the south bank of the Fushoge River (a tributary of the Barrow), about 5 km (3 mi) west of Carlow town. A ringfort, known as Killeshin moat, stands to the southeast.
The monastery was plundered by Diarmait mac Máel na mBó in 1041; the dairthech (oak prayer house) was demolished, a hundred people taken away as slaves and 700 cattle also seized. This attack was a retaliation against the burning of Ferns by Murchadh mac Dunlaing and the murder of Domnall Remar (Donal the Fat, Diarmait's brother). Killeshin was burned again in 1077, along with its yew trees.
The church, built in the 12th century AD (probably in 1150–60), is built of rubble masonry with dressed quoins and is particularly noted for its Romanesque archway, zoomorphic carvings and Scandinavian-influenced knotwork. There is also a granite font.
- ""The Founding of Killeshin"". sites.rootsweb.com.
- "The Romanesque church at Killeshin, Co. Laois, near Carlow". www.culturalheritageireland.ie.
- Colm (2 November 2014). "The wonderful 12th century R omanesque doorway at Killeshin, Laois - Irish Archaeology".