Leopold, Duke of Bavaria (b. 1108)
Leopold (German: Luitpold, c. 1108 – 18 October 1141), known as Leopold the Generous (German: Luitpold der Freigiebige), was margrave of Austria (appearing in lists as Leopold IV) from 1136, and duke of Bavaria from 1139 until his death in 1141.

1141Oct, 18
Leopold, Duke of Bavaria
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Events on 1141
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Battle of Qatwan
Yelü Dashi, the Liao dynasty general who founded the Qara Khitai, defeats the Seljuq and Kara-Khanid forces at the Battle of Qatwan.