Philip of Swabia

Because the election of a three-year-old boy to be German king appeared likely to make orderly rule difficult, the boy's uncle, Duke Philip of Swabia, brother of late Henry VI, was designated to serve in his place. Other factions however favoured a Welf candidate. In 1198, two rival kings were chosen: the Hohenstaufen Philip of Swabia and the son of the deprived Duke Henry the Lion, the Welf Otto IV. A long civil war began; Philip was about to win when he was murdered by the Bavarian count palatine Otto VIII of Wittelsbach in 1208. Pope Innocent III initially had supported the Welfs, but when Otto, now sole elected monarch, moved to appropriate Sicily, Innocent changed sides and accepted young Frederick II and his ally, King Philip II of France, who defeated Otto at the 1214 Battle of Bouvines. Frederick had returned to Germany in 1212 from Sicily, where he had grown up, and was elected king in 1215. When Otto died in 1218, Fredrick became the undisputed ruler, and in 1220 was crowned Holy Roman Emperor. Philip changed the coat of arms from a black lion on a gold shield to three leopards, probably derived from the arms of his Welf rival Otto IV.