The history of Alcázar Seville dates back to the 9th century when the Umayyad Caliphate built the original fortress on the site of an earlier Roman fortress in 913-914 AD. The Almohads, a Berber Muslim dynasty, conquered Seville in 1181-1182 AD and began rebuilding the fortress by adding defensive towers, walls, and gates. Later, in 1364 AD, King Pedro I of Castile commissioned the construction of the Palacio Mudéjar in 1364 AD, and between 1366 and 1369 AD, the Hall of the Ambassadors was completed.