Konrad I of Masovia (ca. 1187/88 – 31 August 1247), from the Polish
Piast dynasty
The House of Piast was the first historical ruling dynasty of Poland. The first documented List of Polish monarchs, Polish monarch was Duke Mieszko I of Poland, Mieszko I (–992). The Poland during the Piast dynasty, Piasts' royal rule in Pol ...
, was the sixth
Duke of Masovia and
Kuyavia
Kuyavia (; ), also referred to as Cuyavia, is a historical region in north-central Poland, situated on the left bank of Vistula, as well as east from Noteć River and Lake Gopło. It is divided into three traditional parts: north-western (with th ...
from 1194 until his death as well as
High Duke of Poland
Poland was ruled at various times either by dukes and princes (10th to 14th centuries) or by kings (11th to 18th centuries). During the latter period, a tradition of Royal elections in Poland, free election of monarchs made it a uniquely electab ...
from 1229 to 1232 and again from 1241 to 1243.
Life
Konrad was the youngest son of High Duke
Casimir II the Just
Casimir II the Just (; 28 October 1138 – 5 May 1194) was a Lesser Polish Duke of Wiślica from 1166 to 1173, and of Sandomierz after 1173. He became ruler over the Polish Seniorate Province at Kraków and thereby High Duke of Poland in 1177; a ...
of
Poland
Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...
and
Helen of Znojmo, daughter of the
Přemyslid duke
Conrad II of Znojmo (ruler of the
Znojmo Appanage in southern
Moravia
Moravia ( ; ) is a historical region in the eastern Czech Republic, roughly encompassing its territory within the Danube River's drainage basin. It is one of three historical Czech lands, with Bohemia and Czech Silesia.
The medieval and early ...
, part of
Duchy of Bohemia
The Duchy of Bohemia, also later referred to in English as the Czech Duchy, (Old Czech: ) was a monarchy and a Princes of the Holy Roman Empire, principality of the Holy Roman Empire in Central Europe during the Early Middle Ages, Early and High M ...
). His maternal grandmother was Maria of Serbia, apparently a daughter of the pre-
Nemanjić ''župan''
Uroš I of Rascia.
After his father's death in 1194, Konrad was brought up by his mother, who acted as
regent
In a monarchy, a regent () is a person appointed to govern a state because the actual monarch is a minor, absent, incapacitated or unable to discharge their powers and duties, or the throne is vacant and a new monarch has not yet been dete ...
of
Masovia
Mazovia or Masovia ( ) is a historical region in mid-north-eastern Poland. It spans the North European Plain, roughly between Łódź and Białystok, with Warsaw being the largest city and Płock being the capital of the region . Throughout the ...
. In 1199, he received Masovia and in 1205 the adjacent lands of
Kuyavia
Kuyavia (; ), also referred to as Cuyavia, is a historical region in north-central Poland, situated on the left bank of Vistula, as well as east from Noteć River and Lake Gopło. It is divided into three traditional parts: north-western (with th ...
as well. In 1205, he and his brother, Duke
Leszek I the White
Leszek the White (; c. 1184/85 – 24 November 1227) was Prince of Sandomierz and High Duke of Poland in the years 1194–1198, 1199, 1206–1210, and 1211–1227. During the early stages of his reign, his uncle Duke Mieszko III the Old and cou ...
of
Sandomierz
Sandomierz (pronounced: ; , ) is a historic town in south-eastern Poland with 23,863 inhabitants (), situated on the Vistula River near its confluence with the San, in the Sandomierz Basin. It has been part of Świętokrzyskie Voivodeship (Holy ...
, had their greatest military victory at
Battle of Zawichost
The Battle of Zawichost also called Zawichost campaign fought on 19 June or 14 October 1205, was a key clash between the troops of Duke Roman the Great of Galicia-Volhynia and the Polish forces led by Leszek the White, Duke of Sandomierz, and his ...
against Prince
Roman the Great
Roman Mstislavich ( – 19 June 1205), also known as Roman the Great, was Prince of Novgorod (1168–1170), Volhynia (1170–1189; 1189–1205), and Galicia (1189; 1198/99–1205). He founded the ''Romanovichi'' branch of Rurikids, which wou ...
of
Galicia–Volhynia. The
Ruthenia
''Ruthenia'' is an exonym, originally used in Medieval Latin, as one of several terms for Rus'. Originally, the term ''Rus' land'' referred to a triangular area, which mainly corresponds to the tribe of Polans in Dnieper Ukraine. ''Ruthenia' ...
n army was crushed and Roman was killed in battle. The
Rurik
Rurik (also spelled Rorik, Riurik or Ryurik; ; ; died 879) was a Varangians, Varangian chieftain of the Rus' people, Rus' who, according to tradition, was invited to reign in Veliky Novgorod, Novgorod in the year 862. The ''Primary Chronicle' ...
princess
Agafia of Rus became his wife.
Attempted conquests of Prussia

In an effort to enlarge his dominions, Konrad unsuccessfully attempted to conquer the adjacent
pagan
Paganism (, later 'civilian') is a term first used in the fourth century by early Christians for people in the Roman Empire who practiced polytheism, or ethnic religions other than Christianity, Judaism, and Samaritanism. In the time of the ...
lands of
Chełmno
Chełmno (; older ; , formerly also ) is a town in northern Poland near the Vistula river with 18,915 inhabitants as of December 2021. It is the seat of the Chełmno County in the Kuyavian-Pomeranian Voivodeship.
Due to its regional importance ...
in
Prussia
Prussia (; ; Old Prussian: ''Prūsija'') was a Germans, German state centred on the North European Plain that originated from the 1525 secularization of the Prussia (region), Prussian part of the State of the Teutonic Order. For centuries, ...
during a 1209
crusade
The Crusades were a series of religious wars initiated, supported, and at times directed by the Papacy during the Middle Ages. The most prominent of these were the campaigns to the Holy Land aimed at reclaiming Jerusalem and its surrounding t ...
with the consent of
Pope Innocent III
Pope Innocent III (; born Lotario dei Conti di Segni; 22 February 1161 – 16 July 1216) was head of the Catholic Church and ruler of the Papal States from 8 January 1198 until his death on 16 July 1216.
Pope Innocent was one of the most power ...
. In 1215, the monk
Christian of Oliva
Christian of Oliva (), also Christian of Prussia () (died 4 December(?) 1245) was the first missionary bishop of Prussia. was appointed a missionary bishop among the
Old Prussians
Old Prussians, Baltic Prussians or simply Prussians were a Balts, Baltic people that inhabited the Prussia (region), region of Prussia, on the southeastern shore of the Baltic Sea between the Vistula Lagoon to the west and the Curonian Lagoon ...
, his residence at
Chełmno
Chełmno (; older ; , formerly also ) is a town in northern Poland near the Vistula river with 18,915 inhabitants as of December 2021. It is the seat of the Chełmno County in the Kuyavian-Pomeranian Voivodeship.
Due to its regional importance ...
however was devastated by Prussian forces the next year. Several further campaigns in 1219, 1222 failed, instead Konrad picked a long-term border quarrel with the Prussian tribes.
The duke's ongoing attempts on Prussia were answered by incursions across the borders of his Masovian lands, while Prussians were in the process of gaining back control over the disputed Chełmno Land and even threatened Konrad's residence at
Płock
Płock (pronounced ), officially the Ducal Capital City of Płock, is a city in central Poland, on the Vistula river, in the Masovian Voivodeship. According to the data provided by Central Statistical Office (Poland), GUS on 31 December 2021, the ...
Castle. Subjected to constant Prussian raids and counter-raids, Konrad now wanted to stabilize the north of his Duchy of Masovia in this fight over the border area of Chełmno.
Teutonic Order
Thus in 1226, Konrad, having difficulty with constant raids over his territory, invited the religious
military order of the
Teutonic Knights
The Teutonic Order is a Catholic religious institution founded as a military society in Acre, Kingdom of Jerusalem. The Order of Brothers of the German House of Saint Mary in Jerusalem was formed to aid Christians on their pilgrimages to t ...
to fight the Prussians, as they already had supported the
Kingdom of Hungary
The Kingdom of Hungary was a monarchy in Central Europe that existed for nearly a millennium, from 1000 to 1946 and was a key part of the Habsburg monarchy from 1526-1918. The Principality of Hungary emerged as a Christian kingdom upon the Coro ...
against the
Cuman people
The Cumans or Kumans were a Turkic nomadic people from Central Asia comprising the western branch of the Cuman–Kipchak confederation who spoke the Cuman language. They are referred to as Polovtsians (''Polovtsy'') in Rus' chronicles, as "C ...
in the Transylavanian
Burzenland from 1211 to 1225. When they notified Hungary that the Order was, firstly, responsible to the
pope
The pope is the bishop of Rome and the Head of the Church#Catholic Church, visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the po ...
, the Knights were expelled by the Hungarian King
Andrew II though. Thus, in turn for the Order's service, Grand Master
Herman of Salza wanted to have its rights documented beforehand, by a deal with Konrad that was to be confirmed by the
Holy Roman Emperor
The Holy Roman Emperor, originally and officially the Emperor of the Romans (disambiguation), Emperor of the Romans (; ) during the Middle Ages, and also known as the Roman-German Emperor since the early modern period (; ), was the ruler and h ...
and the
Roman Curia
The Roman Curia () comprises the administrative institutions of the Holy See and the central body through which the affairs of the Catholic Church are conducted. The Roman Curia is the institution of which the Roman Pontiff ordinarily makes use ...
.
Emperor
Frederick II issued in March 1226 the
Golden Bull of Rimini, stating that:
:''"...our trusty Brother Herman, the worthy Master of the Sacred House of the Hospital of St. Mary of the Germans in Jerusalem ''
.e., ''the Teutonic Order''' has explained ... that our devoted Konrad ''(Chünradus)'', Duke of Masovia and of Kuyavia ''(Cuiaviae)'', has promised and undertaken to provide to him and to his brethren from that land, which is called the Chelmło Land ''(terra quae vocatur Culmen)'', and in that other land, that is to say, between his borderland ''(marchiam)'' and the territories of the Prussians ''(confinia Prutenorum)'', that they may thus indeed take up the task and readily embark upon the invasion and obtaining of the land of Prussia ''(terram Prusciae)'' for the honor and glory of the true God.''
:''"We therefore... especially because the land itself is held under the sole rule of the Empire ''(sub monarchia imperii)'', trusting also in the judgment ''(prudentia)'' of the same Master, because he is a man mighty both in deed and word and through his own and his brethren’s perseverance is mightily undertaking and manfully carrying out the conquest of that land... even though many, vainly besought with numerous exertions in this business, gave up ''(defecerunt)'' just when they seemed about to set forth, grant the land of Prussia to the same Master along with the forces of his order and with all those who think to invade
t'..."
So far, the Knights were not convinced to take the trouble of fighting the Prussians. On the advice of the first Prussian bishop,
Christian of Oliva
Christian of Oliva (), also Christian of Prussia () (died 4 December(?) 1245) was the first missionary bishop of Prussia. , Konrad instead founded the Loyal
Order of Dobrzyń in 1228. He then called for another
Prussian Crusade
The Prussian Crusade was a series of 13th-century campaigns of Roman Catholic Church, Roman Catholic Crusades, crusaders, primarily led by the Teutonic Knights, to Christianization, Christianize Forced conversion, under duress the Prussian mythol ...
, and was again defeated. In view of an imminent Prussian invasion, Konrad supposedly signed the
Treaty of Kruszwica in 1230, according to which he granted Chełmno Land to the Teutonic Knights and the Order of Dobrzyń. By this donation disclaiming any
enfeoffment
In the Middle Ages, especially under the European feudal system, feoffment or enfeoffment was the deed by which a person was given land in exchange for a pledge of service. This mechanism was later used to avoid restrictions on the passage of t ...
, Konrad established the nucleus of the
State of the Teutonic Order
The State of the Teutonic Order () was a theocratic state located along the southeastern shore of the Baltic Sea in northern Europe. It was formed by the knights of the Teutonic Order during the early 13th century Northern Crusades in the region ...
. However the document does not exist and it is believed that it was never signed and that the Order most likely forged it. The Knights under the command of
Hermann Balk crossed the
Vistula
The Vistula (; ) is the longest river in Poland and the ninth-longest in Europe, at in length. Its drainage basin, extending into three other countries apart from Poland, covers , of which is in Poland.
The Vistula rises at Barania Góra i ...
river and conquered Chełmno Land, erecting the castle of
Toruń
Toruń is a city on the Vistula River in north-central Poland and a World Heritage Sites of Poland, UNESCO World Heritage Site. Its population was 196,935 as of December 2021. Previously, it was the capital of the Toruń Voivodeship (1975–199 ...
(''Thorn'') in 1231. In 1234,
Pope Gregory IX
Pope Gregory IX (; born Ugolino di Conti; 1145 – 22 August 1241) was head of the Catholic Church and the ruler of the Papal States from 19 March 1227 until his death in 1241. He is known for issuing the '' Decretales'' and instituting the Pa ...
issued the
Golden Bull of Rieti, confirming the prior deals with the Teutonic Knights, stating that the land of the Order was only subject to the Pope, not a fief of anyone. In 1237, the Order's lands were confiscated by Konrad and forced to invest the town of Dobryczin.
High Duke
Konrad was also entangled in the conflict over the Polish
Seniorate Province
Seniorate Province, also known as the Senioral Province, was a district principality in the Duchy of Poland that was formed in 1138, following the fragmentation of the state.Kwiatkowski, Richard. The Country That Refused to Die: The Story of t ...
with his Piast cousin Duke
Władysław III Spindleshanks of
Greater Poland
Greater Poland, often known by its Polish name Wielkopolska (; ), is a Polish Polish historical regions, historical region of west-central Poland. Its chief and largest city is Poznań followed by Kalisz, the oldest city in Poland.
The bound ...
and assumed the title of a Polish High Duke in 1229. However their
Silesian relative Duke
Henry I the Bearded
Henry the Bearded (, ; c. 1165/70 – 19 March 1238) was a Polish duke from the Piast dynasty.
He was Dukes of Silesia, Duke of Silesia at Wrocław from 1201, Seniorate Province, Duke of Kraków and List of Polish monarchs, High Duke of all Kin ...
finally prevailed as High Duke at Kraków in 1232 and confined Konrad's rule again to Masovia. When Henry's son and heir, High Duke
Henry II the Pious
Henry II the Pious (; 1196 – 9 April 1241) was Duke of Silesia and High Duke of Poland as well as Duke of South-Greater Poland from 1238 until his death. Between 1238 and 1239 he also served as regent of Sandomierz and Opole– Racibórz. He ...
was killed at the 1241
Battle of Legnica
The Battle of Legnica (), also known as the Battle of Liegnitz () or Battle of Wahlstatt (), was fought between the Mongol Empire and combined European forces at the village of Legnickie Pole (''Wahlstatt''), approximately southeast of the ci ...
, Konrad once again assumed the senioral title, but had to yield to the claims raised by his nephew
Bolesław V the Chaste
Bolesław V the Chaste (; 21 June 1226 – 7 December 1279) was Duke of Sandomierz in Lesser Poland from 1232 and High Duke of Poland from 1243 until his death, as the last male representative of the Lesser Polish branch of Piasts.
Birth and n ...
, son of his elder brother Leszek, two years later.
Marriage and children
Around 1208/1209 Konrad married
Agafia of Rus, daughter of Prince
Svyatoslav III Igorevich. They had ten children:
#
Bolesław I (c. 1210 – 17 April 1248), Duke of Masovia
#
Casimir I (c. 1210/13 – 14 December 1267), Duke of
Kuyavia
Kuyavia (; ), also referred to as Cuyavia, is a historical region in north-central Poland, situated on the left bank of Vistula, as well as east from Noteć River and Lake Gopło. It is divided into three traditional parts: north-western (with th ...
#
Siemowit I (c. 1215 – 24 June 1262), succeeded eldest brother as Duke of Masovia.
#Eudoxia (b. c. 1215–1225), married Count Dietrich I of
Brehna
Brehna is a town and a former municipality in the district of Anhalt-Bitterfeld, in Saxony-Anhalt, Germany. Since 1 July 2009, it is part of the town Sandersdorf-Brehna.
It is situated southwest of Bitterfeld. Important in this city is the churc ...
and
Wettin
#Ludmila, probably a
norbertine
The Order of Canons Regular of Prémontré (), also known as the Premonstratensians, the Norbertines and, in Britain and Ireland, as the White Canons (from the colour of their habit), is a religious order of canons regular in the Catholic Church ...
nun at
Płock
Płock (pronounced ), officially the Ducal Capital City of Płock, is a city in central Poland, on the Vistula river, in the Masovian Voivodeship. According to the data provided by Central Statistical Office (Poland), GUS on 31 December 2021, the ...
.
#Ziemomysł (c. 1220 – 10 July/18 September 1241).
#Salomea (c. 1220/1225 – aft. 30 August 1268?), probably a
clare nun at
Skała.
#Judith (c. 1222/27 – 4 December 1257/63), married firstly to Duke
Mieszko II the Fat
Mieszko II the Fat () ( – 22 October 1246) was a Duke of Opole-Racibórz from 1230 until his death, and Duke of Kalisz-Wieluń during 1234–1239 (with his brother as co-ruler).
He was the eldest son of Duke Casimir I of Opole by his wife Viola ...
of
Opole
Opole (; ; ; ) is a city located in southern Poland on the Oder River and the historical capital of Upper Silesia. With a population of approximately 127,387 as of the 2021 census, it is the capital of Opole Voivodeship (province) and the seat of ...
, secondly to Duke
Henry III the White of
Wrocław
Wrocław is a city in southwestern Poland, and the capital of the Lower Silesian Voivodeship. It is the largest city and historical capital of the region of Silesia. It lies on the banks of the Oder River in the Silesian Lowlands of Central Eu ...
.
#Dubrawka (b. c. 1230, d. 1265).
#Mieszko (bef. 1236 – bef. 1238), died in infancy
Konrad's legacy
Konrad is considered by Poles to be responsible for Teutonic Knights' control of most of the
Baltic
Baltic may refer to:
Peoples and languages
*Baltic languages, a subfamily of Indo-European languages, including Lithuanian, Latvian and extinct Old Prussian
*Balts (or Baltic peoples), ethnic groups speaking the Baltic languages and/or originatin ...
coastline, undermining Polish authority in the area. King
Casimir III of Poland
Casimir III the Great (; 30 April 1310 – 5 November 1370) reigned as the King of Poland from 1333 to 1370. He also later became King of Ruthenia in 1340, retaining the title throughout the Galicia–Volhynia Wars. He was the last Polish king fr ...
had to accept the rule of the Order in Thorn and Kulm by the 1343
Treaty of Kalisz. After the
Thirteen Years' War in the 1466
Second Peace of Thorn
The Peace of Thorn or Toruń of 1466, also known as the Second Peace of Thorn or Toruń (; ), was a peace treaty signed in the Hanseatic city of Thorn (Toruń) on 19 October 1466 between the Polish king Casimir IV Jagiellon and the Teutonic Knig ...
, the Polish King
Casimir IV Jagiellon
Casimir IV (Casimir Andrew Jagiellon; ; Lithuanian: ; 30 November 1427 – 7 June 1492) was Grand Duke of Lithuania from 1440 and King of Poland from 1447 until his death in 1492. He was one of the most active Polish-Lithuanian rulers; under ...
gained control over the Chełmno Land as part of
Royal Prussia.
See also
*
History of Poland (966–1385)
The period of rule by the Piast dynasty between the 10th and 14th centuries is the first major stage of the history of the Polish state. The dynasty was founded by a series of dukes listed by the chronicler Gall Anonymous in the early 12th cen ...
References
Sources
*
*
*
*
*
*
*
*
*
External links
Altes Preussenland before 1200* Catholic Encyclopedia ''Innocent III resolved (1207) to organize a new crusade...Instead of concentrating the forces of Christendom against the Mohammedans, the pope himself disbanded them by proclaiming (1209) a crusade against the Albigenses in the south of France, and against the Almohades of Spain (1213), the pagans of Prussia, and John Lackland of England.''
{{DEFAULTSORT:Konrad 01 Of Masovia
1180s births
1247 deaths
13th-century Polish monarchs
Polish Roman Catholics
Dukes of Masovia
Dukes of Sieradz-Łęczyca
Christians of the Prussian Crusade