Prince Constantin of Liechtenstein, a prince from one of Europe’s oldest royal families, died suddenly on Tuesday at the age of 51. The father of three was seventh in line to the throne and the third ...

The Princely House of Liechtenstein is mourning the sudden death of Prince Constantin at age 51. The royal house announced the news in a statement on Wednesday and did not disclose a cause of death.

The son of reigning Prince Hans-Adam and dad of three was seventh in the line of succession Janine Henni is a Royals Staff Writer for PEOPLE Digital, covering modern monarchies and the world's most ...