In OTL Mateu Morral, a Spanish anarchist attempted to assassinate the Spanish King and his wife on their wedding day on May 31st, 1906. His bomb didn't kill the King or his wife, but did kill close to 30 people. It was a bomb thrown at the passing royal carriage. So, if Alfonso the 13th and his wife, Victoria Eugenia had died in 1906, what would have changed in Spanish and world history? Who would succeed the throne of Spain?