In 1576 William, with the support of Holland, Zeeland and their allies, put forth forty articles, by which doctors, elders and deacons were recognized, and church discipline given to the elders, subject to appeal to the magistrate and by which the Church was placed in absolute dependence on the state.
Dordrecht, Leiden, Haarlem, Delft, Vlaardigen, Rotterdam in Holland, and Middleburg and Zierikzee in Zeeland, repeated with modifications the characteristics of the communes of Flanders and Brabant.
He inherited Flanders and Artois, purchased the county of Namur (1427) and compelled his cousin Jacqueline, the heiress of Holland, Zeeland, Hainault and Friesland, to surrender her possessions to him, 1428.
Four duchies, Brabant, Gelderland, Limburg and Luxemburg; seven counties, Flanders, Artois, Hainault, Holland, Zeeland, Namur and Zutphen; the margraviate of Antwerp; and five lordships - Friesland, Mechlin, Utrecht, Overyssel, and Groningen with its dependent districts.
Flushing, the port of Zeeland, which commanded the approach to Antwerp; and the inhabitants were compelled to take the oath to the prince of Orange, as stadtholder of the king.