The site abandoned for the founding of Castelló de la Plana

This is the Castell de Fadrell, also known as Castell Vell, Castell de la Magdalena, dels Moros, or de Sas. It was a military stronghold of Muslim origin built between the 11th and 13th centuries. It was occupied by the Cid and by the Aragonese king Pere el Catòlic, before being taken by the Almoravids.

In 1172, the lands of Fadrell became tributary to Alfons el Cast, who later handed them over to the bishop of Tortosa. The castle was eventually reconquered in 1233 by Jaume el Conqueridor. Once its strategic importance faded, the inhabitants moved to the fertile plain, leading to the founding of the new city of Castelló de la Plana in 1252.

Today, the castle stands in ruins, though remains of the four enclosures can still be seen. The first enclosure is the alcassaba, which features three semicircular towers, and remains of walls and aljubs. The second enclosure, the albacar, contains three other towers and the hermitage of la Magdalena, which was built over a rock-cut aljub. The third enclosure features a large keep tower to the north-west, and the fourth consists of the outer walls constructed using the tapiador technique.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons