Henri I, Grand Duke of Luxembourg
At the age of nine, and was officially created hereditary grand duke on his 18th birthday in 1973
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Henri I, Grand Duke of Luxembourg
At the age of nine, and was officially created hereditary grand duke on his 18th birthday in 1973
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-17 from Wikipedia. The archived copy is preserved so this citation survives link rot.