Ulrich von Liechtenstein
Ulrich von Liechtenstein (1200-1278) was a successful minnesinger and jouster. He went on a romantic quest to honour the name of a lady, competing in jousts in disguise as an unknown lady. Pity the lady he was fighting for wasn't his wife and never thought much of him. He wrote an autobiographical collection of verse "Frauendienst" (Lady's Service).
He was very involved in politics and became governor of Styria. He was knighted by Leopold VI, Duke of Austria, and owned three castles: Schloss Murau, the Frauenburg near Unzmarkt, and Burg Liechtenstein.
Many SCA members will recognize the name as being that of the character played by Heath Ledger in the film "A Knight's Tale", which was loosely based on a story in Chaucer's "Canterbury Tales". The real and the Hollywood Ulrichs do not seem to be related in any way other than being jousters in disguise.