Chapelle romane de Champlieu, Ruined Romanesque church in Orrouy, France

The Chapelle romane de Champlieu, in Orrouy, is a ruined church: only the west and north walls of the nave, the transept and the flat-chested choir remain. The transept and choir, dating to the late 10th century, have low round arches; the nave, from the second half of the 12th century, has pointed arches on square piers. A weathered stone wall with three round-headed arches and a square pillar stands among trees.

Excavations found that the ruined church replaced a Carolingian building at least as large; the transept and flat-chested choir may date from the late 10th century, and the barrel vaults from the last third of the 11th. The nave followed in the second half of the 12th century, with a pointed portal with triple archivolte. Closed for worship in 1808 because of its poor state, the church was struck by lightning in 1814 and classified as a monument historique on 8 March 1923.

The church held a chapel dedicated to Saint James the Great, the only hint that pilgrims of Saint-Jacques may have passed by; the sources record no proven Compostela pilgrimage. Its patronal feast was fixed on 8 September, and a long-standing pilgrimage to the Vierge de Champlieu was recommended for ailing children and pregnant women.

The ruin stands in a hamlet of Orrouy between the Gallo-Roman site of Champlieu and the Brunehaut road, with the west facade facing the street and an old calvary cross in front. Visitors can walk around the building and go inside, as conservation work has halted its collapse. A small wood borders it to the north, and farmed fields come close to the chevet and the south side.

The nave's west and north walls are all that remain standing; the north aisle was abandoned in the 14th or 15th century. The oldest known depiction of the church, from 1842, already shows it in its present ruined state.