The Alcázar of Seville, officially called Royal Alcázar of Seville, is a historic royal palace in Seville, Spain. It was formerly the site of the Islamic-era citadel of the city, begun in the 10th century and then developed into a larger palace complex by the Abbadid dynasty and the Almohads. After the Castilian conquest of the city in 1248, the site was progressively rebuilt and replaced by new palaces and gardens.