Engelbert I. He became counsellor to the Burgundian Dukes of Brabant, first to Anton of Burgundy, and later to his son Jan IV of Brabant. He also would later serve Philip the Good. In 1403, he married the Dutch noblewoman Johanna van Polanen and so inherited lands in the Netherlands, with the Barony of Breda as the core of the Dutch possessions and the family fortune. A nobleman's power was often based on his ownership of vast tracts of land and lucrative offices. It also helped that much of the lands that the House of Orange-Nassau controlled sat under one of the commercial and mercantile centres of the world (see below under Lands and Titles). The importance of the family grew throughout the 15th and 16th centuries as they became councilors, generals and stadholders of the Habsburgs (see armorial of the great nobles of the Burgundian Netherlands and List of Knights of the Golden Fleece). Engelbert II of Nassau served Charles the Bold and Maximilian I, Holy Roman Emperor, who had married Charles's daughter Mary of Burgundy. In 1496, he was appointed stadtholder of Flanders and by 1498 he had been named President of the Grand Conseil. In 1501, Maximilian named him Lieutenant-General of the Seventeen Provinces of the Netherlands. From that point forward (until his death in 1504), Engelbert was the principal representative of the Habsburg Empire to the region. Hendrik III of Nassau-Breda was appointed stadtholder of Holland and Zeeland by Charles of Ghent in the beginning of the 16th century. Hendrik was succeeded by his son René of Chalon in 1538, who had inherited the title of Prince of Orange and the principality of that name from his maternal uncle Philibert of Chalon. In 1544, René died in battle aged 25. His possessions, including the principality and title, passed by his will as sovereign prince to his paternal cousin, William I of Orange. From then on, the family members called themselves "Orange-Nassau." Eighty Years' War Although Charles V pretended to resist the Protestant Reformation, he ruled the Dutch territories wisely with moderation and regard for local customs, and he did not persecute his Protestant subjects on a large scale. His son Philip II inherited his antipathy for the Protestants but not his moderation. Under the reign of Philip, a true persecution of Protestants was initiated and taxes were raised to an outrageous level. Discontent arose and William