circa 1912: Grand Duchess Marie-Adélaïde of Luxembourg (1894 - 1924). She ascended to the throne in 1912, abdicating in 1919 in favour of her sister Charlotte. (Photo by Keystone/Getty Images)
circa 1912: Grand Duchess Marie-Adélaïde of Luxembourg (1894 - 1924). She ascended to the throne in 1912, abdicating in 1919 in favour of her sister Charlotte. (Photo by Keystone/Getty Images)