Mayerling incident
The Mayerling incident is the series of events surrounding the apparent murder–suicide pact of Rudolf, Crown Prince of Austria, and his lover, Mary "Freiin" von Vetsera. They were found dead on 30 January 1889 in an imperial hunting lodge in Mayerling. Rudolf, who was married to Princess Stéphanie of Belgium, was the only son of Emperor Franz Joseph and Empress Elisabeth, and was heir apparent to the throne of Austria-Hungary.