Facing the German invasion in 10 May 1940 during World War II, the Grand Ducal Family of Luxembourg left the country to find refuge in Portugal, after receiving transit visas from the Portuguese consul Aristides de Sousa Mendes, in June 1940.

After travelling through Coimbra and Lisbon, the family first stayed in Cascais, in Casa de Santa Maria, owned by Manuel Espírito Santo, who was then the honorary consul for Luxembourg in Portugal.

By July they had moved to Monte Estoril, staying at the Chalet Posser de Andrade.

[2] With her sister Princess Elisabeth, Duchess of Hohenberg, Princess Marie Adelaide attended Convent of the Sacred Heart, Roehampton in Britain and the Collège Jésus-Marie de Sillery,[3] near Quebec City, during the family's exile during World War II.

They had four children – three sons and a daughter - and eight grandchildren: This biography of a member of a European royal house is a stub.