Henry V (1086–1125), great-grandson of Conrad II, who had overthrown his father Henry IV became Holy Roman Emperor in 1111. Hoping to gain greater control over the church inside the Empire, Henry V appointed Adalbert of Saarbrücken as the powerful archbishop of Mainz in the same year. Adalbert began to assert the powers of the Church against secular authorities, that is, the Emperor. This precipitated the "Crisis of 1111" as yet another chapter of the long-term Investiture Controversy. In 1137 the prince-electors turned back to the Hohenstaufen family for a candidate, Conrad III. Conrad tried to divest his rival Henry the Proud of his two duchies—Bavaria and Saxony—that led to war in southern Germany as the empire was divided into two powerful factions. The faction of the "Welfs" or "Guelphs" (in Italian) supported the House of Welf of Henry the Proud, which was the ruling dynasty in the Duchy of Bavaria. The rival faction of the "Waiblings" or "Ghibellines" (in Italian) pledged allegiance to the Swabian House of Hohenstaufen. During this early period, the Welfs generally maintained ecclesiastical independence under the papacy and political particularism (the focus on ducal interests against the central imperial authority). The Waiblings, on the other hand, championed strict control of the church and a strong central imperial government.