Prince of Spain
Prince of Spain (Spanish: Príncipe de España), was the title created in 1969 designated by law proclaiming Juan Carlos de Bourbon as the successor of Francisco Franco. Juan Carlos held the title until 22 November 1975, when he became King of Spain following the death of Franco. Not being used again since his heirs return to the traditional prince of Asturias.
The title was given the associated style of His Royal Highness and the military honors of the Captain General of the Army. The design of the royal standard was regulated by decree on 22 April 1971 for the personal use by the Prince of Spain.