1 adjectives to describe dukedoms

The bishops of Utrecht became by degrees weaker; private dissensions enfeebled Friesland; Luxemburg was a poor, unimportant dukedom; but Holland, Hainault, and Brabant formed the very heart of the Netherlands; while the elder branch of the same family, under whom they were united, possessed Flanders, Artois, and the two Burgundies.

1 adjectives to describe  dukedoms