About this time a disputed election caused a schism in the order, and two rival grand masters for several years divided the allegiance of the knights, till Henry de Hohenlohe was recognized by both sides as master.  During his term of office successful war was carried on in Courland and other neighboring countries, which resulted in the spread of Christianity and the advance of the power of the order.  At the same time, the Teutonic order took part in the crusades in Palestine, and shared with the Templars and Hospitalers the successes and reverses there.

It would be tedious to enter upon all the details of the conflicts undertaken by the order against the Prussians and others; suffice it to say that the knights, though often defeated, steadily advanced their dominion, and secured its permanence by the erection of fortresses, the centres about which cities and towns ultimately arose.  Among these were Dantzic, Koenigsberg, Elbing, Marienberg, and Thorn.

By the year 1283 the order was in possession of all the country between the Vistula and the Memel, Prussia, Courland, part of Livonia, and Samogitia; commanderies were established everywhere to hold it in subjection, and bishoprics and monasteries were founded for the spread of Christianity among the heathen population.  In the contests between the Venetians and the Genoese, the Teutonic Knights aided the former, and in 1291, after the loss of Acre, the grand master took up his residence in Venice.

About this time the Pope originated a scheme for the union of the three orders of the Hospitalers, the Templars, and the Teutonic Knights, into one great order, purposing at the same time to engage the Emperor and the kings of Christendom to lay aside all their quarrels, and combine their forces for the recovery once for all of the Holy Land.  Difficulties without number, which proved insuperable, prevented the realization of this scheme.  Among these was the objection raised by the Teutonic Knights, that while the Hospitalers and Templars had but one object in view—­the recovery of Palestine, their order had to maintain its conquests in the North of Europe, and to prosecute the spread of the true faith among the still heathen nations.

In 1309, when all hope of the recovery of the Christian dominion in the East had been abandoned, and no further crusades seemed probable, it was determined to remove the seat of the grand master from Venice to Marienberg.  At a chapter of the order held there, further regulations were agreed upon for the government of the conquered countries, some of which are very curious, but give an interesting picture of the state of the people and of society at that period.  Thus it was commanded that no Jew, necromancer, or sorcerer should be allowed to settle in the country.  Masters who had slaves, and generally Prussians, prisoners of war, were obliged to send them to the parish church to be instructed by the clergy in the Christian religion.  German alone was to be spoken, and the ancient language of the country was forbidden, to prevent the people hatching conspiracies, and to do away with the old idolatry and heathen superstitions.  Prussians were not allowed to open shops or taverns, nor to act as surgeons or accoucheurs.