==Antwerp?== 
 "The Count of Flanders controlled a number of old Roman cities (Boulogne, Arras, Cambrai) as well as some founded by the Carolingians (Valenciennes, Saint-Omer, Ghent, Bruges, Antwerp). The County of Flanders thus extended to the left bank of the Scheldt, one of the richest and most properous regions of Europe." 

 Antwerp is at the right bank of the Scheldt and was, as far as I know, a part of the Duchy of Brabant.