The Thirty Years’ War in Germany (1618–1648) may be considered as an extreme application of the principle of censorship. The power of the emperor and that of the Catholic princes who associated themselves with the emperor, was directed to the suppression of Protestantism in Germany and with this to the control under the direction of the Roman Church of German thought and of German intellectual development. This was, of course, an attempt to do something much wider than to control and restrict the printing-press, but the control and restriction of the operations of the printers constituted an essential part of the purpose of the pope, the emperor, and their allies the Jesuits and Dominicans. In so far as the Catholics held their own, succeeding in maintaining their control in the States of South Germany, the printers had to accept the continued authority of the ecclesiastics backed by the power of the State. The States of North Germany, on the other hand, with the all-powerful aid of Gustavus Adolphus and his sturdy Swedes, were able to maintain by force of arms their independence as citizens, and secured also the right to think and to speak, to print and to read for themselves, free from decisions to be arrived at by the Dominican Congregation of Italy or the Jesuit censors of Vienna. The waste of life and of treasure brought upon Germany through the thirty years’ strife was enormous, but even as a matter of material advantage, the contest was for North Germany worth all that it had cost. =7. The Netherlands.=--The work of the printers in Holland was begun in Utrecht in 1473. The Dutch printers had from the outset the enormous advantage in their business of a practical freedom from interference by censorship, whether ecclesiastical or political. This was also true for a quarter of a century or more with the printing centres of Flanders, where, under the initiative of Mansion, Caxton, and their successors, the work of printing was begun, in 1474, in Bruges and in Louvain. In 1476, Caxton migrated from Bruges to London, setting up his first press in the courtyard of Westminster Abbey. The Dukes of Burgundy had, for several generations prior to the introduction of printing, been noted for their liberal interest in literature, and for their great collections of manuscripts, and this sympathetic relation of the Burgundian rulers to literature continued through the first half-century of printing.