It has emerged that Archduchess Estelle of Austria, who was just 46, died earlier this month, leaving behind her five young ...

The Austrian royal family has gone into mourning following the death of Archduchess Estelle, who died at the start of the ...

Prince Frederik of Luxembourg's family has shared a poignant new photo of the late royal taken before his death at the age of ...

Mei Fa Tan spoke exclusively to Us Weekly about what it was like to work with Luxembourg’s Prince Frederik before his death ...

POLG-related diseases disrupt the function of the mitochondria, or "powerhouses" of the cell — starving them of energy.

Commissioned by Frederik’s mother, Princess Julia of Nassau, to helm an educational short film about the disease with ...

The prince had PolG disease, a genetic mitochondrial disorder that prevents the body's cells from producing adequate energy.

Prince Frederik of Luxembourg, who died at 22, spoke about the rare genetic disorder he navigated in a video released by The ...

The move will cost businesses and residents in each state up to $400,000 per day, and lift the average energy bill by about $100 per month, Premier Doug Ford said at a news conference. The province ...

Prince Frederik of Luxembourg has died of a rare condition known as POLG mitochondrial disease, his family has said. Frederik passed away on March 1 at the age of 22, his parents said in a statement ...