The rulers of the sovereign County of Verdun styled themselves as Counts by the grace of God.
[1][2] The small country was located near Lower Lotharingia within the Holy Roman Empire.
[3] The Forest of Argonne formed the western border of the county, but it also included the fortresses at Montfaucon-d'Argonne and Vienne-le-Château.
[3] According to an imperial diploma issued in 1156, Bishop Haimo of Verdun received the right to appoint counts, but the counts from the Ardennes-Bouillon dynasty made the office hereditary by the end of the 10th century.
[4] In 1134, the bishop deposed Reginald and reattached the county to the episcopal demesne.