The Mosque–Cathedral of Córdoba, Andalusia, is also known as both the Cathedral of Our Lady of the Assumption and as a former mosque, the Mezquita. The Great Mosque was constructed in 785 on the orders of Abd al-Rahman I and expanded multiple times subsequently under his successors until the late 10th century. In 1236, the mosque was converted to a cathedral when Córdoba was captured by the Christian forces of Castile during the Reconquista. It remained relatively unchanged until the 16th century when a new Renaissance nave and transept was added into the centre and the former minaret, which had been converted to a bell tower, was also remodelled. Today it is not only Córdoba’s serving cathedral but also a UNESCO World Heritage Site.