 The kingdoms that would consolidate to form Spain during the 15th and 16th centuries, namely the Kingdoms of Castile and Aragon, did not have consistent coronation ceremonies.The last recorded coronation ceremony in what would become Spain occurred in the 15th century; since then, the monarchs were not crowned, but proclaimed.As such, there was decreased importance for a coherent set of crown jewels, as these are usually themselves coronation regalia.