The family began with Trasimondo, the father of Lotario Conti, who became Pope Innocent III in 1198. He ruled until 1216. The second Conti pope was Ugolino (1227-1241), as Gregory IX. The third pope to come from the Conti family was Rinaldo, as Alexander IV (r. 1254-1261). Later, in the early modern period, Michelangelo Conti reigned as Pope Innocent XIII from 1721 to 1724.