Luxembourg's Royal Family has announced the death of Prince Frederick at 22 years old.

The prince of a small nation in western Europe has died at the age of 22 from a rare genetic condition. Prince Frederik was the youngest son of Prince Robert of Luxembourg and Princess Julie of Nassau ...

"Prince Robert of Luxembourg and Princess Julie of Nassau have shared the heartbreaking news through their PolG Foundation that their youngest son, Prince Frederik of Nassau (born March 18, 2002), has ...

Prince Frederik of Luxembourg was born with POLG ... The royal was diagnosed with it at the age of 14 when his symptoms became more noticeable. He passed away earlier this month at the age of ...

Prince Frederik of Luxembourg has died at the age of 22 from a rare genetic condition, according to a statement from his father, Prince Robert of Luxembourg, through the family's foundation.

Prince Frederik, the youngest son of Prince Robert of Luxembourg and Princess Julie of Nassau, has died at 22 from a rare genetic condition.

Prince Frederik of Luxembourg has passed away at the age of 22 after a lifelong battle with a rare genetic disorder known as POLG mitochondrial disease.

Prince Hisahito, the only son of Crown Prince Akishino and Crown Princess Kiko, will attend a coming-of-age ceremony on Sept. 6, his 19th birthday, the Imperial Household Agency said Thursday.