ใครแต่งงานกับOtto IV, Holy Roman Emperor?

Otto IV (1175 – 19 May 1218) was the Holy Roman Emperor from 1209 until his death in 1218.

Otto spent most of his early life in England and France. He was a follower of his uncle Richard the Lionheart, who made him Count of Poitou in 1196. With Richard's support, he was elected King of Germany by one faction in a disputed election in 1198, sparking ten years of civil war. The death of his rival, Philip of Swabia, in 1208 left him sole king of Germany.

In 1209, Otto marched to Italy to be crowned emperor by Pope Innocent III. In 1210, he sought to unite the Kingdom of Sicily with the Empire, breaking with Innocent, who excommunicated him. He allied with England against France and participated in the alliance's defeat at Bouvines in 1214. He was abandoned by most of his supporters in 1215 and lived the rest of his life in retirement on his estates near Brunswick. He was the only German king of the Welf dynasty.

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Beatrice or Beatriz of Swabia (April/June 1198 – 11 August 1212), a member of the Hohenstaufen dynasty, was Holy Roman Empress and German Queen in 1212 as the first wife of the Welf emperor Otto IV. She was also the shortest-serving Holy Roman Empress, dying three weeks into her marriage.

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Maria of Brabant (c. 1190 – May/June 1260), a member of the House of Reginar, was Holy Roman Empress from 1214 until 1215 as the second and last wife of the Welf emperor Otto IV.

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