Arnold I. von Valcourt

Arnold I of Vaucourt (, ) (circa 1120 – May 25, 1183 in Trier), was the Archbishop of Trier from 1169 to 1183. He took a pro-Imperial position in the Investiture Controversy of the twelfth century. As archbishop, Arnold was accounted a capable ruler, by turns thrifty and generous, with a genuine concern for his church and his domain.

Born into the Rhenish nobility of the upper Lorraine in the modern French département of Meurthe-et-Moselle), Arnold was most likely the child of the Lord (Seigneur, Ritter) Wirich of Vaucourt (the founder of a (no longer extant) Cistercian abbey at Freistroff and thus related to several celebrated personalities of the time (e.g. Hildegard of Bingen, with whom Arnold corresponded (This stronghold had lain waste since the feud of his predecessor Poppo of Babenberg with the anti-archbishop Adalbero of Luxembourg. ) This unfortunately gave the first impulse to a struggle between Arnold's German kin, who claimed the castle as a family fief, and the Archbishops of Trier, who claimed it as a dependency of the archbishopric; their strife lasted some two centuries, culminating in the devastation of Montclair under Archbishop Baldwin of Luxembourg.

Upon Arnold's death in Trier in May 1183, the succession to the Archbishopric fell into dispute between Folmar of Karden and Rudolf of Wied.