page_title: Otto IV, Holy Roman Emperor
section_title: Family
hierarchical_section_title: Otto IV, Holy Roman Emperor / Family
caption_attribution_description: English: Braunschweig, Old town city hall: Statue of Otto IV and his second wife Mary of Brabant, c. 1455. Deutsch: Braunschweig, Altstadtrathaus: Statue Ottos IV. und seiner zweiten Frau Maria von Brabant auf der Südseite des Gebäudes.
context_page_description: Otto IV was one of two rival kings of Germany from 1198 on, sole king from 1208 on, and Holy Roman Emperor from 1209 until he was forced to abdicate in 1215. The only German king of the Welf dynasty, he incurred the wrath of Pope Innocent III and was excommunicated in 1210.
context_section_description: Otto was related to every other King of Germany. He married twice:
  1209 or 1212 to Beatrice of Swabia, daughter of the German King Philip of Swabia and Irene Angelina.
  19 May 1214, in Aachen to Maria of Brabant, daughter of Henry I, Duke of Brabant, and Matilda of Boulogne.
  Neither marriage produced any children.
caption: Statues of Otto IV & Maria of Brabant, old city hall, Braunschweig, c. 1455.
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