text: A member of this family forced magistrates of a captured city to draw a fig from a donkey's anus with their teeth.
full_question: A member of this family forced magistrates of a captured city to draw a fig from a donkey's anus with their teeth. Another ruler from this family issued a legal code for an island in the Constitutions of Melfi, and signed a peace with Al-Kamil for control of Jerusalem. The founder of this dynasty, which succeeded the House of SupplinbÃ¼rg, faced a sacred war wagon called the Carroccio in one battle. That founder suppressed the Commune of Rome and its leader Arnold of Brescia, beat the Seljuks at the battle of Iconium, and held the Diet of Roncaglia after losing at Legnano to the Lombard League. This dynasty's founder went with Richard I and Philip II on the Third Crusade, but drowned in the Saleph River. For 10 points, name this German dynasty begun by Frederick Barbarossa.
first_sentence: A member of this family forced magistrates of a captured city to draw a fig from a donkey's anus with their teeth.
raw_answer: House of Hohenstaufen [or Swabian dynasty; or Staufer]