in the conflicts of 1170–1180. The Nassau possessions in this area were expanded around 1214 when Henry received the Imperial Vogtship (Reichsvogtei) over Wiesbaden and the surrounding Königssondergau, which he held as fiefdoms. About the year 1200, Henry, together with his brother Rupert, began building Sonnenberg on a spur of Spitzkippel peak in the Taunus above Wiesbaden. This was intended for protection against the Archbishop of Mainz and its vassals, the Lords of Eppstein, who held the lands bordering Wiesbaden. However, the cathedral chapter of St. Martin's Cathedral in Mainz claimed Sonnenberg as their own. To settle the dispute, Nassau paid 30 Marks to the cathedral chapter in 1221 to acquire the land of Sonnenberg Castle. They were also forced to recognize the sovereignty of the Archbishops of Mainz over Sonnenberg, taking the castle as a fief of Mainz. Towards the end of the 12th century, Walram I had been able to strengthen his power on the lower Lahn. As part of the inheritance of the Counts of Arnstein, he succeeded them as the Archbishopric of Trier's Vogt in Koblenz, Pfaffendorf (now a borough of Koblenz), Niederlahnstein, and Humbach (Montabaur). However, by the 1230s, Trier's influence near the Rhine and Lahn had strengthened enough to oust Nassau from the majority of the Archbishopric's vogtships. The Archbishop had reinforced Montabaur around 1217 in order to protect his possessions on the right bank of the Rhine from Nassau. In 1224, Henry found support from Engelbert II, the Archbishop of Cologne, who made Henry his Hofmarschall and Schenk (an honorary title that originally meant "cup-bearer"). However, in exchange for his protection from the Archbishops of Mainz and Trier, Henry had to cede half of Siegen to Cologne. Unaffected by this division of rule, however, Nassau retained its sovereign rights in Siegerland (the region surrounding Siegen), where the important High Jurisdiction (hohe Gerichtsbarkeit) and Hunting Ban (Wildbann) explicitly survived to 1259. During his reign, Henry fought out numerous feuds, especially with the nobles von Willnsdorf over Siegen, and von Merenberg over the Landgericht Rucheslo in the old Erdehegaue. In the Siegerland, Henry built Ginsburg Castle during his reign. Henry's brother, Rupert, had joined the Teutonic Order in 1230. On his death in 1239, Rupert bequeathed his legacy to the Order. Henry continuously disputed any division of his realm with the Teutonic Order. Henry also held the Upper Vogtship over the Diocese of St. George