Castle of Comiols Monument · Artesa de Segre, Noguera, Lleida The castle of Comiols, in the municipal term of Artesa de Segre (Noguera), is declared a bien cultural de interés nacional (Spain's highest level of heritage protection). It was built to control the village, its term and the pass of the coll de Comiols, and to link with the castles of the Segre plain, starting with that of Montmagastre. Of the fortification, the lower level of the main tower survives, circular in plan, 5 to 6 metres high, with an internal diameter of 4.2 metres and walls 1.6 metres thick, covered by a dome of slabs arranged in circles. The walls combine small ashlars and others somewhat larger, well aligned and bonded with lime mortar; two arrow slits opened at the main level. Towards the 11th century the tower would have been two or three times its current height. Photo: PMRMaeyaert (CC BY-SA 3.0 es) What to see and do in Artesa de Segre