The Church of San Lorenzo is located in Vallejo de Mena, a village in the Valley of Mena, part of the region of Las Merindades in the Province of Burgos, Spain. The sources that support the dating of the church are limited. An inscription in the church likely dating from the early 13th century states that the site was donated to the Order of Saint John Hospitallers. The church was probably built in two phases; during the first one, in the last years of the 12th century, the apse was erected, while the second one, in the first quarter of the 13th century, resulted in the completion of the nave.