Prince Frederik, 22, was a founder and the creative director of a foundation that raised awareness of POLG disorder.

Prince Frederick of Luxembourg died at the age of 22 — he suffered from a rare genetic disease, writes The Sun. The death of the prince was announced by his father Robert of Luxembourg, a cousin of Duke Henri.

Prince Frederik of Luxembourg died from a genetic disease called PolG, but experts hope his passing could bring more awareness to the rare condition that impacted his life. Prince Frederik, 22, died from a mitochondrial disease known as PolG,