Prince of Asturias
Prince or Princess of Asturias (Spanish: Príncipe/Princesa de Asturias) is the main substantive title used by the heir apparent, or heir presumptive to the Spanish Crown. According to the Spanish Constitution of 1978: Article 57.2: The Crown Prince, from the time of his birth or the event conferring this position upon him, shall hold the title of Prince of Asturias and the other titles traditionally held by the heir to the Crown of Spain.