What is Otto IV, Holy Roman Emperor?
[[File:Braunschweiger Dom Heinrich Mathilde OttoIV.jpg|thumb|Gothic tomb of Henry the Lion, and Mathilde. Tomb of Otto IV of Brunswick in front.]] '''Otto IV''' (1175 – 19 May 1218) was the [[Holy Roman Emperor]] from 1209 until his death in 1218. == Early life== A member of the [[Welf dynasty]], Otto was a son of [[Henry the Lion]] of Brunswick and [[Empress Matilda|Matilda]], daughter of [[Henry II of England]]. Brought up at the court of his uncle [[Richard I of England]], Otto was made earl of York in 1190 ==Family== 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. [[Category:1170s births]] [[Category:1218 deaths]] [[Category:Holy Roman Emperors]]