Alcazar de Los Reyes Cristianos was a site that started with the Romans, then the Visigoths, then the Muslims, and then the Christians. Some theories say that the different groups built their edifices in the same location because it was a divine decision from the Gods. Other say it was simply a more practical decision because it is easier to build over something than create something new. Also it was a good location because it is next to the river. And finally, using the same building shows an assertion of power, almost as if conquering a group of people.