Conímbriga is a walled urban settlement, encircled by a curtain of stone structures approximately long. Entrance to the settlement is made from vaulted structures consisting of two doors (one on hinges), at one time defended by two towers. The walls are paralleled by two passages, channelled to excavations, that remove water infiltration from the walls. The urban settlement consists of various structures, including a forum, basilica and commercial shops, thermal spas, aqueducts, insulae, homes of various heights (including interior patios) and domus (such as the "Casa dos Repuxos" and "Casa de Cantaber"), in addition to a paleo-Christian basilica.