When Juan Carlos announced his abdication last week in favour of his son, his decision was meant to shore up the embattled monarchy.
Instead, it has only revived calls for its abolition. Thousands of demonstrators in Madrid and other cities marched to call for a referendum on whether Spain should remain a monarchy, or become a republic.
The United Left, the third most powerful party in the Spanish Parliament, wants a referendum. Its leader, Cayo Lara, says a bill could be introduced in parliament seeking a referendum within three months.
King Juan Carlos reigned for 39 years and has largely been a popular monarch but a series of scandals in recent years have dealt him a severe blow.
With Prince Felipe now on track to be Spain's next king, we ask: Can he restore trust in the monarchy? Or will he be Spain's last king?
Presenter: Hazem Sika
Ana Romero, royal commentator who has covered the Royal House for the El Mundo newspaper.
Bill Bond, freelance journalist based in the Spanish capital.