County of Mark
…was crossed by the Lenne. In the region of the Lower Lenne was the County of Limburg (1243–1808), a fiefdom of Berg. The seat of the Counts of the Mark von de Marck or de la Marck was originally the Burg Altena in the Sauerland region, but moved to Burg Mark near Hamm in the 1220s. The county was bordered by Vest…