The aim of this work is to present the results obtained in the framework of the PREFORTI Project. The particular case analysed is the damages caused by earthquakes in the medieval fortifications of Almeria and the consequences on their conservation. Almeria is a zone of important seismic activity. This particularity has caused many problems to conserve its Islamic military architecture.
Almería was one of the most important cities in al-Andalus, a circumstance that was possible thanks to the strength of its port. Its foundation as an urban entity during the Caliphate of Córdoba originated a typical scheme of an Islamic city organized by a medina and a citadel, both walled.
The medieval city walls of Almeria have abundant references in Arabic sources and numerous preserved remains, either in all its elevation, or as small archaeological remains on the current slope and even under the ground. This circumstance has given rise to a lot of scientific literature on the chronology of each of the different existing precincts: Alcazaba, Medina, suburbs and outer enclosure.
After the capitulation of the nasrid city of Almería (1489), the new Castilian administration was able to verify the state of ruin of its defences due to the earthquake of 1487, ordering the rapid construction of a castle on the highest point of the battered hispano-muslim Alcazaba.