Otto IV of Brunswick 1
- Born: Cir 1176, Normandy, France
- Marriage (1): Beatrice of Hohenstaufen on 2 Jul 1212
- Marriage (2): Marie de Brabant after 19 May 1214
- Died: 19 May 1218, Harzburg aged 42
General Notes:
Otto IV of Brunswick, was King of Germany (1208-1215) and Holy Roman Emperor from 1209 - 1215.
He was the son of Henry the Lion, Duke of Bavaria and Saxony and Matilda Plantagenet, and was elected king when his rival for the throne, Philip of Swabia (Hohenstaufen), was murdered. Otto had been supported by Pope Innocent III, but Innocent withdrew his support after Otto's military adventures in Italy. In 1211 the Diet of Nuremberg ordered Otto deposed and Frederick II Hohenstaufen elected in his place, but until Otto lost the battle of Bouvines (July, 1214) decisively to the forces of Philip II of France nothing happened. He was deposed in 1215 and died in 1218.
Otto married Beatrice of Hohenstaufen, daughter of Philip of Swabia Hohenstaufen and Irene of Byzantium, on 2 Jul 1212. (Beatrice of Hohenstaufen was born in 1198 and died on 11 Aug 1212.)
Otto next married Marie de Brabant, daughter of Henry I of Brabant and Matilda of Boulogne, after 19 May 1214. (Marie de Brabant was born about 1191 and died after 9 Mar 1260.)
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