The church of Saint-Jacques-et-Saint-Philippe (St. James and St. Philip) in Lentilles is unique. As building stone was scarce in the Aube department, people built churches with oak wood – the only resource available in the Der region – and cob. The façade of the main entrance and the base of the bell tower are covered with cut wooden tiles. A variety of materials are used: slate on the bell tower, flat tiles on the nave and aisles, chestnut wood cladding and shingles on the façade and entrance porch, oak beams and clay and straw cob on the church walls.