Rudolf, 1858–89, Austrian archduke, crown prince of Austria and Hungary; only son of Emperor Francis Joseph and Empress Elizabeth. Upon his mysterious death at Mayerling near Vienna (officially declared a double suicide with his mistress, Baroness Maria Vetsera), his cousin Francis Ferdinand became heir to the Austro-Hungarian throne.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.