
On the 8th of June 1583 Alcossebre was formally incorporated into Alcalá de Xivert. At that time the affairs of Alcalá were handled by the Order of Montesa, a Spanish military order who had replaced Templar control of Alcalá after the suppression of the Order of Knights Templar by the papacy in 1312.
Alcossebre (Alcocever in the Act of Incorporation) at this time appears to have been little more than a market garden for Alcalá, although its position 'a la vora de la mar' also required the civil authorities of Alcalá to maintain and pay for the upkeep of a Tower at 'Capicorp'.
By this act Alcossebre was brought under the civil and criminal jurisdiction of Alcalá de Xivert. The locality of Alcossebre was probably empty of inhabitants at the time of incorporation because of the ever-present fears of Barbary pirates along the coastline.
Two pieces of evidence support the notion of an Alcossebre without inhabitants: the first is the unequivocal statement in the Act of Incorporation that 'Alcosever lo qual de temps inmemorial está despoblat'; the second piece of evidence supporting an empty Alcossebre is the statement that the incorporation was to be regarded as without prejudice to the [pre-existing] rights of Alcalá - without any mention of a parallel body of rights for any inhabitants of Alcossebre.
Twenty-five years later the lives of every inhabitant of Alcalá de Xivert who could trace their lineage back to a muslim ancestor would change dramatically, when they were herded together to become part of a 300,000 strong diaspora, expelled from their homeland to the uncertainties of exile in North Africa.

