Otto was born at
Kelheim. ; oil painting after an original of the 15th century. At the age of sixteen, he was married to
Agnes of the Palatinate, a granddaughter of Duke
Henry the Lion and
Conrad of Hohenstaufen. With this marriage, the Wittelsbach inherited the
Palatinate and kept it as a Wittelsbach possession until 1918. Since that time also the lion has become a heraldic symbol in the coat of arms for Bavaria and the Palatinate. Otto acquired the rich regions of
Bogen in 1240, and
Andechs and
Ortenburg in 1248 as possessions for the Wittelsbach and extended his power base in Bavaria this way. With the county of Bogen the Wittelsbach acquired also the white and blue coloured lozenge flag which since that time has been the flag of Bavaria (and of the Palatinate). After a dispute with emperor
Frederick II was ended, he joined the
Hohenstaufen party in 1241. His daughter, Elizabeth, was married to Frederick's son
Conrad IV. Because of this, Otto was excommunicated by the pope. He died in
Landshut in 1253. Like his forefathers, Otto was buried in the crypt of
Scheyern Abbey. == Family and children ==