Otto von Habsburg was born in 1912 in Austria-Hungary and became Crown Prince at age 4 after his father became emperor in 1916. After World War 1, both monarchies were abolished and the family went into exile. Otto spent his life advocating for European unity and served as a Member of the European Parliament from 1979-1999. He lived in exile in several countries until being allowed to return to Austria in 1966. Otto von Habsburg died in 2011 at the age of 98.