King Juan Carlos of Spain to abdicate
2 June 2014 Last updated at 11:16 BST
King Juan Carlos of Spain has decided to abdicate, Prime Minister Mariano Rajoy has announced.
The 76-year-old has ruled since 1975 and pending a constitutional amendment his son Prince Felipe, 45, will take over the throne.
The BBC's Guy Hedgecoe said he was a "huge figure of democracy" in Spain.