He pursued his victories in Friesland, and forced the country to recognize him as stadtholder of Groningen, its chief town; while the duke of Saxony at length renounced to another his unjust claim on a territory which engulfed both his armies and his treasure.
About the same epoch (1515), young Charles, son of Philip the Fair, having just attained his fifteenth year, was inaugurated duke of Brabant and count of Flanders and Holland, having purchased the presumed right of Saxony to the sovereignty of Friesland.

In the following year he was recognized as prince of Castile, in right of his mother, who associated him with herself in the royal power--a step which soon left her merely the title of queen.

Charles procured the nomination of bishop of Utrecht for Philip, bastard of Burgundy, which made that province completely dependent on him.

But this event was also one of general and lasting importance on another account.

This Philip of Burgundy was deeply affected by the doctrines of the Reformation, which had burst forth in Germany.