Sauveterre-de-Guyenne, just 7kms east of Castelviel, is a bastide, founded in 1281 Edward I of England (aka "Edward Longshanks"), who ,as a vasall of the French king, was Duke of Aquitaine. Though the wall around the bastide was demolished in the 19th century, to give room for urban development, four of the old gates still exist.

The hamlet of Le Puch, just north of Sauveterre-de-Guyenne, has this church, dedicated to Saint Christopher in the center of its cemetery. It dates back to the 11th century. Though it got altered and restored many times, the 12th-century-portal is still complete.