Alfonso XII of Spain
María de las Mercedes, Princess of Asturias (María de las Mercedes de Borbón y Habsburgo-Lorena) (11 September 1880 – 17 October 1904), was the eldest child of King Alfonso XII of Spain and his second wife, Maria Christina of Austria. She was Princess of Asturias, the heir presumptive to the Crown of Spain, for all 24 years of her life.