Juan Carlos I of Spain Spanish constitution refers to the monarch by the simple title "King of Spain". Aside from this title, the constitution allows for the use of other historic titles pertaining to the Spanish monarchy, without specifying them. This was also reiterated by a decree promulgated on 6 November 1987 concerning titles of members of the royal family. Since his abdication in 2014, King Juan Carlos has retained, by courtesy, the title and style of King that he enjoyed during his reign. Juan Carlos I of Spain Juan Carlos I (; Juan Carlos Alfonso Víctor María de Borbón y Borbón-Dos Sicilias, born 5
Juan Carlos I of Spain the Sons of the American Revolution. Juan Carlos I is also a black belt in karate. A benign 17-19mm tumour was removed under general anaesthetic from King Juan Carlos's right lung in an operation carried out in the "Hospital Clínic" of Barcelona in May 2010. The operation followed an annual check-up, and Juan Carlos was not expected to need any further treatment. In April 2012, the King underwent surgery for a triple fracture of the hip at the San Jose Hospital, Madrid, following a fall on a private elephant-hunting trip to Botswana. He also underwent a hip operation in September