Teutonic Knights

History

The Northern Crusades

The term “Northern Crusades” refers collectively to the campaigns of Christian military-religious institutions — principally the Teutonic Order and the Sword Brothers of Livonia, but also the Hospitallers and various secular crusading armies — against the pagan and Orthodox peoples of the eastern Baltic between the late twelfth and the late fourteenth centuries. For the Teutonic Order, the Northern Crusades were not a side theatre: they were, from the 1230s until the baptism of Lithuania in 1386, the principal theatre of operations and the principal justification of the Order’s corporate existence. The Order was, in this period, the dominant military-religious institution of north-eastern Europe, and the Prussian and Lithuanian campaigns were to determine the political shape of the region for centuries to come.

The Background: The Baltic in the Twelfth Century

The Baltic region of the twelfth century was a mosaic of peoples, languages, and religious confessions. The western and southern shores of the Baltic had been undergoing Christianisation and German colonisation since the reign of Henry the Lion in the 1160s. The eastern shore, however, remained pagan. The Prussian tribes — a Baltic people speaking a language closely related to Lithuanian and Latvian, organised into a dozen or so territorial communities — occupied the territory between the lower Vistula and the lower Niemen. The Lithuanians, a related people further to the east, occupied a vast and lightly populated territory between the Niemen and the Dvina. The Russian principalities of Novgorod and Pskov held the eastern and southern shores of the Baltic.

The Appeal of Conrad of Masovia and the Golden Bull of Rimini

The first direct engagement of the Teutonic Order in the Baltic was the consequence of a personal appeal by Duke Conrad of Masovia, a Piast prince of the Polish duchies on the middle Vistula. The Prussian tribes had been conducting, for two generations, devastating raids into the Polish lands, and Conrad’s appeal of 1226 was a request for a permanent military force to assist him in the defence of his duchy. The appeal was, in form, a transfer of sovereignty: the ius conquerendi, the right to conquer, to Christianise, and to hold in perpetual tenure, was to be granted to the Order by the Emperor Frederick II, in a charter known as the Golden Bull of Rimini.

The Golden Bull was issued in March 1226. Its effect was to make the Order the principal Christian sovereign in the Prussian theatre. The Order was to act, in Prussia, not as a mercenary auxiliary of the Polish duke but as a sovereign corporation exercising, in its own name, the rights of conquest and Christianisation. The Order’s commitment to the Prussian theatre was, in consequence, of a quite different character from its earlier engagements in the Latin East. The Order was not merely an auxiliary of a lay ruler; it was itself the principal.

The first Teutonic knight-brothers entered Prussia in the late 1220s. The first major engagement was the conquest of the Prussian tribe of the Pomesanians, on the lower Vistula, completed by 1233. The Order then moved north, against the Pogesanians, the Natangians, the Warmians, and the Bartians, in a series of campaigns that lasted, with interruptions, for the next forty years. The Order also built, in this period, a chain of commanderies and convent castles along the Vistula and the Frische Haff, the long lagoon that separated the Vistula delta from the open Baltic. The principal of these castles were the Ordensburgen of Marienwerder, Elbing, and Balga, all of which were built in the 1230s and 1240s.

The Conquest of the Western Prussians

The conquest of the western Prussian tribes — the Pomesanians, the Pogesanians, the Natangians, the Warmians, and the Bartians — was completed, in its first phase, by the late 1250s. The Order had, by 1255, established its principal Prussian seat at Königsberg, a new town founded in that year on the site of an earlier Prussian fortress. The Order’s administrative system in Prussia was based on a network of Komtureien (commanderies), each of which governed a territory of roughly a hundred square miles and was responsible for the defence, the administration of justice, the collection of tithes, and the supervision of the local Christian population.

The Christianisation of the conquered Prussian territories was, in this period, rapid and severe. The native Prussian religion was suppressed, the sacred groves and holy sites were destroyed, and the population was converted, nominally and at times by force, to Latin Christianity. The German colonisation of the new lands was promoted by the Order through a generous system of legal privileges: the Kulm law, a charter of municipal law modelled on the law of Magdeburg, was extended to the new towns, and German peasants were invited to settle the agricultural lands under a chartered status that was more favourable than anything they could have expected in the German lands of origin.

The Great Prussian Uprising, 1260–1274

The great Prussian uprising began in September 1260, in the southern Prussian territory of the Pomesanians, and spread, within months, to most of the Prussian tribes. The cause of the uprising is a matter of historical dispute: traditional accounts emphasise the religious oppression of the native Prussian religion, the burden of tribute, and the brutality of the Order’s commissioners. More recent historiography has emphasised the political dislocation of the conquest, the resentment of the Prussian nobility at the loss of their traditional status, and the destabilising effect of the Mongol invasions of eastern Europe, which had demonstrated that the Christian knights were not, in fact, invincible.

The uprising of 1260 was, at first, a series of uncoordinated local revolts, but it was rapidly consolidated, under the leadership of a Prussian chief named Herkus Monte, into a coordinated campaign of resistance. The Order lost, in the first years of the uprising, almost all of its possessions in the interior of Prussia: the commanderies, the churches, the mills, the bridges, and the German settlements were overrun, and the knight-brothers were either killed, captured, or forced to retreat to the chain of convent castles along the Vistula. The Order’s position in the central and southern Prussian lands was effectively reduced to a few fortified points.

The turning point of the uprising came in 1271, when the Order’s landmeister of Prussia, Konrad von Thierberg the Elder, succeeded in dividing the Prussian tribes by a mixture of military pressure and diplomatic negotiation. The uprising was gradually suppressed, by a combination of renewed crusade from the German lands, the construction of new castles, and the exploitation of the divisions between the Prussian tribes, by 1274. The Order’s position in Prussia was, however, profoundly changed by the experience. The reconstruction of the Prussian territories was a major task, and the Order was to rely, for the security of its position, on a much more extensive system of German colonisation than it had previously envisaged.

The Battle of Durbe, 1260

The same year that saw the beginning of the great Prussian uprising also saw, on the eastern frontier of the Order’s possessions in Livonia, the catastrophic battle of Durbe. The battle of Durbe, fought on 13 July 1260 between the combined forces of the Teutonic Order and the Livonian branch on the one side and the Samogitians, supported by Curonians and a contingent of Pskov Russians, on the other, was a major defeat for the Order: the Livonian master, the Ordensmarschall of Livonia, and a large number of knight-brothers were killed, and the Order’s position in the southern Baltic was seriously weakened. The battle of Durbe was a direct encouragement to the Prussian uprising, and it is impossible to understand the gravity of the Prussian revolt of 1260 without reference to the simultaneous crisis in Livonia.

The Lithuanian Campaigns

The Prussian Crusade was, in its first phase, principally a campaign against the Prussian tribes. By the 1260s, however, the Order’s attention was increasingly turning to the larger and more populous territory of Lithuania. The Lithuanian campaign was, in scale, an order of magnitude greater than the Prussian one, and it was to continue, with varying intensity, until the baptism of Lithuania in 1386.

The Order’s Lithuanian campaigns were conducted in the same manner as the Prussian ones: a combination of annual summer Reisen (raids) into Lithuanian territory, the construction of frontier castles, and the diplomatic exploitation of the divisions between the Lithuanian clans. The Order’s principal opponent in the Lithuanian theatre was the grand duchy of Lithuania, which had, by the late thirteenth century, achieved a substantial degree of political centralisation under the dynasty of Gediminas. The Lithuanian grand dukes were, for most of the thirteenth century, pagans, and the Order’s claim to be conducting a Christian crusade against them was, on the whole, accepted in the Latin West.

The Lithuanian campaigns were punctuated by major battles, several of which are described in detail elsewhere in this site. The battle on the ice of Lake Peipus in 1242 was an early, celebrated defeat of the Order by Alexander Nevsky, prince of Novgorod, in the theatre of the Russian principalities. The battle of Durbe, in 1260, was a major setback in the Samogitian theatre. The battle of Groß-Schwäben in 1261, the battle of Karuse in 1270, and the battle of Aizkraukle in 1279 were further engagements in the same general theatre. The Lithuanian campaigns were, however, not concluded by any single decisive battle; they were concluded, rather, by the conversion of the grand duchy of Lithuania to Latin Christianity in 1386, under the Jagiellonian dynasty.

The Novgorod Campaign and the Battle on the Ice

The Teutonic Order’s third major Baltic campaign was against the Orthodox Russian principalities, principally Novgorod and Pskov, on the southern shore of the Gulf of Finland. The campaign was a direct extension of the Livonian crusade; the Order’s interest in the Russian theatre was the protection of the Livonian possessions and the conversion of the Orthodox Russians to the Latin rite.

The most celebrated engagement of the campaign was the battle on the ice of Lake Peipus in April 1242, in which the army of Prince Alexander Yaroslavich, soon to be known as Alexander Nevsky, defeated the forces of the Livonian branch of the Teutonic Order on the frozen surface of the lake. The battle was a serious defeat for the Order, and it effectively ended the Order’s eastward expansion in the Russian theatre.

The End of the Northern Crusades

The Northern Crusades, came to an end with the baptism of Lithuania in 1386. The Order’s traditional justification for the Prussian and Lithuanian campaigns — the conversion of the pagans — was, from that point, formally obsolete. The Order’s continued campaigns against the Christian Jagiellonian dynasty were, increasingly, regarded in the Latin West as unjustified aggression rather than legitimate crusade. The Order was to conduct several more campaigns against the Jagiellonians in the late fourteenth and early fifteenth centuries, but the religious rhetoric of crusade was progressively replaced by the secular rhetoric of territorial defence.

The political consequences of the Northern Crusades were, however, immense. The Teutonic Order had, by 1400, created a sovereign state in Prussia that was to dominate the politics of north-eastern Europe until the battle of Grunwald in 1410. The German colonisation of the conquered lands had created a German-speaking population east of the Elbe and the Vistula that was to persist for centuries. The Latin Christianisation of the Baltic was, in this period, substantially completed. The political entities that emerged from the conquest — the Teutonic state in Prussia, the Livonian Confederation, the bishoprics of Dorpat, Ösel-Wiek, and Courland — were to constitute the political framework of the Baltic region until the sixteenth century.

Sources

The two decisive engagements of the period are treated in detail in the articles on the battle on the ice of 1242 and the battle of Durbe in 1260. For the wider context, see the parent History of the Teutonic Knights and the article on the founding of the Order. The territorial state that emerged from the Prussian Crusade is examined under the Prussian state, and the Order’s overall military campaigns are surveyed in the parent article on that subject. The Livonian theatre is treated in detail under the Livonian branch. The great Prussian uprising is set in the wider context of the establishment of the Prussian state, and the convent castles that the Order built during the campaigns are examined in the article on the Order’s castles and architecture.

By The Teutonic Knights Editorial Team · Last reviewed 13 June 2026 · About the team · QA log

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