Castelmayran (; ) is a commune in the Tarn-et-Garonne department in the Occitanie region in southern France. History Lordship of Castelmayran In the 12th century, the lordship belonged to a branch of the family of Argombat which founded the Cistercian abbey of Belleperche. And by 1143 the final transfer of the abbey was discussed at a meeting held in Castelmayran. Castelmayran had several co-seigneurs over time, among whose Nicolas de Gourgues, the last one before the French Revolution. Lectoure and Lomagne Before 1789, Castelmayran was a city of Gascony, in the diocese of Lectoure, and election of Lomagne. Administration The mayor of Castelmayran is Thierry Jamain, re-elected in 2020. Notes and references Notes References See also Communes of the Tarn-et-Garonne department External links Communes of Tarn-et-Garonne