The Alcazaba de Merida is a clear example of how architecture is reinvented and recycled throughout history. The Romans built this site next to the bridge over the Guadiana River, one of the gates of the city, which the Romans built with great walls to protect the Romans from potential enemies. When the Empire fell and Merida was conquered by the Muslims, they reused this building in order to create a fortress, which according to historians was one of the finest examples of the first defensive constructions dating from the Islamic period in the Iberian Peninsula, and which was indeed the first of its kind to be lifted.
Built by Rahman II in 835 d. C. as a stronghold to control from which to the city, which since 805 had rebelled continuously against the Emirate, is a complex construction, which consists of a large square enclosure that measures 130 square meters, and is capable of accommodating a large number of troops. Inside you will find an 'aljibe', which is a building consisting of a tank of filtered water from the Guadiana which was reached with a double corridor from the ground floor of a tower. Currently, it is open to the public and from its ramparts you can admire a stunning and beautiful view of the Guadiana River, the Roman bridge, as well as the the beautiful promenade that was built along the river bank.