File photo dated July 1, 2017 of Juan Carlos 1st King of Spain and

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European Parliament in Strasbourg during the parliamentary session

Spain's monarchy shaken by Juan Carlos's hidden Swiss fortune - BBC News

History of Juan Carlos I - Timeline - Historydraft

The strange bromance of Spain's ex-King Juan Carlos and King Charles

42,748 Juan Carlos I Photos & High Res Pictures - Getty Images

European Parliament in Strasbourg during the parliamentary session

Spanish royal family: The downfall of Spain's Juan Carlos I, Opinion

Juan Carlos' ex-mistress reveals former Spanish king received 'bags full of cash