The years of the Truce gave the Habsburg Netherlands a much needed breathing-space. The fields could again be worked in safety. The archducal regime encouraged the reclaiming of land that had been inundated in the course of the hostilities and sponsored the
impoldering of the
Moeren, a marshy area that is presently astride the Belgian–French border. The recovery of agriculture led in turn to a modest increase of the population after decades of demographic losses. Industry and in particular the luxury trades likewise underwent a recovery. International trade was however hampered by the closure of the River
Scheldt. The archducal regime had plans to bypass the blockade with a system of canals linking Ostend via
Bruges to the Scheldt in
Ghent and joining the
Meuse to the
Rhine between
Venlo and
Rheinberg. In order to combat urban poverty, the government supported the creation of a network of
Monti di Pietà based on the Italian model. , Meanwhile, the archducal regime ensured the triumph of the
Counter-Reformation in the Habsburg Netherlands. Most Protestants had by that stage left the Southern Netherlands. After
one last execution in 1597, those that remained were no longer actively persecuted. Under the terms of legislation passed in 1609, their presence was tolerated, provided they did not worship in public. Engaging in religious debates was also forbidden by law. The resolutions of the Third
Provincial Council of Mechelen of 1607 were likewise given official sanction. Through such measures and by the appointment of a generation of able and committed bishops, Albert and Isabella laid the foundation of the Catholic
confessionalisation of the population. The same period saw important waves of
witch-hunts. In the process of
recatholicisation, new and reformed religious orders enjoyed the particular support of Albert and Isabella. Even though the archduke had certain reservations about the order, the
Jesuits received the largest cash grants, allowing them to complete their ambitious building programmes in Brussels and Antwerp. Other champions of the Catholic Reformation, such as the
Capuchins, were also given considerable sums. The foundation of the first convents of
Discalced Carmelites in the Southern Netherlands depended wholly on the personal initiative of the archducal couple and bore witness to the Spanish orientation of their spirituality. The reign of Albert and Isabella Clara Eugenia saw a strengthening of princely power in the Habsburg Netherlands. The
States General of the loyal provinces were only summoned once in 1600. Thereafter the government preferred to deal directly with the provinces. The years of the Truce allowed the archducal regime to promulgate legislation on a whole range of matters. The so-called
Perpetual Edict (1611), for instance, reformed the judicial system and ushered in the transition from customary to written law. Other measures dealt with monetary matters, the nobility, duels, gambling, etc. Driven by strategic as well as religious motives, Albert intervened in the squabbles over the inheritance of the
United Duchies of Jülich-Cleves-Berg. He played a major role in the
war and the subsequent confrontation with the armies of the Dutch Republic led to the
Treaty of Xanten. The episode was in many ways a rehearsal of what was to come in the
Thirty Years' War. After the
defenestration of Prague, Albert responded by sending troops to his cousin
Ferdinand II and by pressing Philip III for financial support to the cause of the Austrian Habsburgs. As such he contributed considerably to the victory of the Habsburg and
Bavarian forces in the
Battle of the White Mountain on 8 November 1620. ==Death and succession==