Factbox: Austria's Habsburgs and their empire
(Reuters) - Otto Habsburg-Lothringen, the eldest son of the last Austrian emperor, died at his home in Germany on Monday.
Here are some facts about Otto and his family:
* Archduke Otto von Habsburg, born in November 1912, became head of the imperial House of Habsburg on the death of his father in 1922.
* Otto's parents were Archduke Charles -- later Emperor Karl I of Austria, king of Hungary, Bohemia, Croatia etc. -- and Princess Zita de Bourbon-Parma (later empress and queen). From 1916 on, Otto was the crown prince of Austria-Hungary.
-- Charles had become heir-presumptive with the assassination of Archduke Franz Ferdinand, his uncle, in Sarajevo in 1914, the event that precipitated World War One. Charles's reign did not begin until 1916, when his grand-uncle, Franz Josef I of Austria died.
* Forced into exile in 1918 to Switzerland and Madeira, Otto graduated from the University of Leuven, Belgium, in social and political science in 1935.
-- He was already an early promoter of European unity and joined the Paneuropa Union in 1936.
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