In who's reign did Grand Duke Henri become the Heir Apparent?
Grand Duke Adolphe
Grand Duke William IV
Grand Duke Jean
Grand Duchess Charlotte
Answer
Henri became the Heir Apparent in the reign of his father, Grand Duke Jean. Grand Duke Jean ruled from 1964 to 2000. Henri was born in 1955 and became the Heir Apparent in 1967. He succeeded his father as Grand Duke in 2000.
The Grand Quiz of Henri, Grand Duke of Luxembourg: Discovering the Reign of a Modern Monarch