Here's why two Spanish kings attended Queen Elizabeth's funeral — and why it's so controversial 

Once revered for his role in Spain's transition to democracy, the popularity of Juan Carlos fell drastically amid financial scandals, affairs, and public disgust at an elephant-hunting trip 

Juan Carlos I of Spain (left) attending the State Funeral of Queen Elizabeth II, held at Westminster Abbey, London. Picture: Gareth Fuller/PA Wire

If the past week has taught us anything about royals, it's that they're never far from controversy, and that isn't confined to the British royals.

Yesterday, alongside Taoiseach Micheál Martin and President Michael D Higgins, the former King of Spain, Juan Carlos, was bussed in to attend a reception in Buckingham Palace on the eve of Queen Elizabeth II’s funeral.