Wall and Medieval Defensive Structures of Tortosa Monument · Tortosa, Baix Ebre, Tarragona Walled enclosure that reused 10th-century Andalusi stretches after the 1148 conquest and was extended around 1368-1369 as part of Pere el Cerimoniós's programme of fortifying towns against the war with Castile; stretches and towers survive, integrated into the present urban layout. Photo: Deosringas (CC BY-SA 3.0) What to see and do in Tortosa