The Catholic Church in Lithuania () is part of the worldwide Catholic Church, under the spiritual leadership of the Pope in Rome. Lithuania is the world's northernmost Latin Catholic-majority country. Pope Pius XII gave Lithuania the title of "northernmost outpost of Catholicism in Europe" in 1939. The Vilnius Cathedral is the most important Catholic Church in Lithuania, which was previously used for the inauguration ceremonies of Lithuanian monarchs with Gediminas' Cap, while in modern times it is a venue for masses dedicated to the elected Presidents of Lithuania after their inauguration ceremonies and giving of oaths to the Nation in the Seimas Palace.
Among the Baltic states, Lithuania is the country with the highest percentage of Catholic population. Almost three-quarters (74.19%) of Lithuania's population self-identified as Catholics in the 2021 census down from 80% in 2007. The country is divided into eight dioceses including two archdioceses and a military ordinariate.
St. Casimir (Kazimieras, 1458–1484) is the only canonized saint of Lithuania. He is the patron of the country and Lithuanian youth. Polish saint Raphael Kalinowski was born in Lithuania's capital Vilnius, then controlled by the Russian Empire. Archbishop Jurgis Matulaitis-Matulevičius (1871–1927) was beatified in 1987, archbishop Teofilius Matulionis (1873–1962) was beatified in 2017.Lithuanian Saints and Witnesses of Faith on the Official Page of Catholic Church in Lithuania
History
Middle Ages (–1500)
11th century Saint Bruno of Querfurt, a missionary bishop, was martyred in 1009 for proclaiming the Christian faith. While some historians assert that he was killed by the Lithuanians, Zigmas Zinkevičius disputes this, arguing that Bruno met his death in territories inhabited by the Yotvingians. It was in connection with this event that the name of Lithuania was first recorded.
13th century The spread of Catholicism in Lithuania began in the 13th century. During the reign of Mindaugas (), the Dominican Order and the Franciscans started establishing their presence in the region. In 1231, Saint Hyacinth of Poland, a Dominican, arrived in Lithuania. In 1251, a delegation sent by Mindaugas informed Pope Innocent IV of the ruler’s desire to be baptized as a Roman Catholic. The Pope warmly welcomed Lithuania’s conversion, issuing no fewer than six papal bulls on the matter. In the first half of 1251, Mindaugas, along with many of his subjects—including a portion of the Lithuanian nobility—embraced Roman Catholicism through baptism.
The baptism of the ruler marked Lithuania’s emergence as an officially Catholic nation, gaining international recognition as early as the 1250s. In response, Pope Innocent IV instructed Heidenreich, the Bishop of Chełmno, to crown Mindaugas with a royal crown in the Pope’s name. On July 6, 1253, Mindaugas was crowned King of Lithuania, and his wife, Morta, became Queen. On August 21 of the same year, the Pope appointed priest Christian as the first Bishop of Lithuania, thereby establishing the Diocese of Lithuania. According to the Lithuanian bishop Jonas Boruta,"A separate diocese directly subordinate to the Pope is already a considerable step for the creation of an ecclesiastical province, and in the Lithuania of Mindaugas' time (if not for unfortunate political events - the murder of Mindaugas, etc.) there were all the conditions for the establishment of an ecclesiastical province as well.."Following Mindaugas’ assassination, Treniota seized power in 1263 and ruled Lithuania for approximately a year, during which he initiated a persecution of Christians. After Treniota’s death in 1264, Lithuania came under the rule of Mindaugas’ son, Vaišvilkas (), and subsequently Mindaugas’ son-in-law, Shvarn (), both of whom adhered to the Orthodox faith. Shvarn’s reign ended amid internal power struggles, and the succeeding Grand Dukes of Lithuania reverted to pagan beliefs.
14th century In the 14th century, Lithuania’s pagan rulers, like Vytenis and Gediminas, constructed Catholic churches and welcomed Catholic priests and monks. For instance, Vytenis () built a Catholic church in Navahrudak and requested two Franciscan monks to manage it. However, knights from the Teutonic Order later destroyed the church.
Gediminas' rule (1316–1341) Gediminas (), Vytenis’ pagan successor, allied with the Archbishop of Riga against the Teutonic Order. This partnership began in 1298, allowing Riga’s Franciscans and Dominicans to work freely in Lithuania. Later, Archbishop Friedrich von Pernstein successfully set up Franciscan and Dominican monasteries in Lithuanian cities. These monks were active on Gediminas’ lands. In Vilnius, two churches were built—one for the Dominicans and one for the Franciscans. Encouraged by these monks and driven by political aims, Gediminas wrote to the Pope in 1322, promising to convert to Roman Catholicism. In 1323, he sent letters to monastery leaders in Western Europe, inviting priests, monks, and lay Christians to Lithuania with a promise of religious freedom.
In June 1324, the Pope promised to send legates to Gediminas, and they reached Riga by autumn. Gediminas refused baptism and acted as if he never promised to convert. He blamed the confusion on a Franciscan who wrote the letter to the Pope. Despite this, the monks kept working to spread Catholicism in Lithuania.
Co-rule by Algirdas and Kęstutis (1345–1377)
Gediminas’ sons, Algirdas and Kęstutis, ruled Lithuania together from 1345 to 1377 and stayed pagan their whole lives. Algirdas, who married Duchess Maria of Vitebsk in 1318, inherited the Principality of Vitebsk in 1320, allowed his children to be baptized Orthodox, and set up the Orthodox Metropolis of Lithuania in the Rus’ lands under his control. Kęstutis was encouraged by the Pope and neighboring rulers like Casimir III of Poland, to become baptised.
In 1351, Louis I (later king of Poland) pushed Kęstutis to get baptized. Kęstutis agreed, but only if Louis returned lands taken by the Teutonic Order and guaranteed his coronation. They swore oaths to the deal, but Kęstutis never went through with baptism.
In 1358, Emperor Charles IV urged both Algirdas and Kęstutis to become Catholic. They promised to convert if the Teutonic Order’s conquered lands were returned and the Order was sent east to fight the Golden Horde Tatars. The deal fell apart, so they stayed pagan.
Though Kęstutis remained pagan, his daughter Danutė was baptized in the 1370s when she married Janusz I, Duke of Masovia. Pope Gregory XI tried to baptize Lithuania in 1373, but that effort failed too.
Lithuanian Civil Wars (1381–1384; 1389–1392) Grand Dukes Jogaila (Algirdas’ son) and Vytautas the Great (Kęstutis’ son) worked to bring Christianity to Lithuania. On October 31, 1382, Jogaila signed the Treaty of Dubysa with the Teutonic Order, promising to give them Samogitia up to the Dubysa River in exchange for their help against Kęstutis and Vytautas. He also pledged to be baptized with his followers within four years. When Jogaila didn’t follow through in 1383, the Order backed Vytautas instead. Vytautas was baptized as a Roman Catholic named Wigand on October 21, 1383, in Tepliava. He promised the Order Samogitia up to the Nevėžis River and received control of three castles near the Nemunas River.
In 1385, Jogaila agreed to the Act of Krėva, marrying Queen Jadwiga of Poland (daughter of Louis I of Hungary) and becoming King of Poland. He accepted Roman Catholicism and was baptized as Ladislaus on February 15, 1386, in Kraków, alongside his brothers and cousin Vytautas, who took the name Alexander. In 1387, Jogaila and Bishop Andrzej Jastrzębiec arrived in Vilnius with Lithuanian-speaking Franciscans to baptize Lithuania, mainly Aukštaitija. On February 17, 1387, Jogaila issued a privilege to support Vilnius Cathedral. The Vilnius diocese was established by Pope Urban VI on March 12, 1388. Jogaila helped build churches in places like Maišiagala, Medininkai, and Obolcai, setting up a chapter with a provost, dean, and 10 canons. Most of the clergy were Poles. The first Franciscan monasteries were also founded during this time.
15th century
A delegation of Samogitian nobles attended the Council of Constance in 1417 to demonstrate that Jogaila and Vytautas were overseeing the baptism of the Samogitians and to demand that Samogitia remain under Vytautas' governance. Additionally, they requested that the future Samogitian diocese be established under the supervision of the bishops of Vilnius and Lviv. When the Teutonic Order prevented a delegation appointed by the Council from traveling to baptize Samogitia, the bishops of Vilnius and Lviv carried out the task. The baptism of Samogitia took place in 1417, and the Samogitian diocese, based in Medininkai, was founded in 1421 under Pope Martin V. A chapter of six canons was also established, with Matthias of Trakai consecrated as the first bishop of Samogitia. In 1422, Matthias became the bishop of Vilnius, and later, in 1453, the bishop of Lutsk, ensuring that ordained priests spoke Lithuanian. Until 1795, both the Vilnius and Samogitian dioceses were part of the ecclesiastical province of Gniezno.
With the support of rulers such as Vytautas and Jogaila, the number of churches in Lithuania grew rapidly. By the late 14th century, the Vilnius diocese had 17 churches, five of which were in Vilnius itself. Polish historian Jerzy Ochmański notes that by 1392, 10 parishes had been established, increasing to 27 across the Grand Duchy of Lithuania by Vytautas' death in 1430. By the end of the 15th century, Lithuania had 109 churches—91 in the Vilnius diocese and 18 or 19 in the Samogitian diocese, seven of which were founded by Vytautas. Between then and the mid-16th century, 103 churches were built in the Vilnius diocese and 38 in the Samogitian diocese. Around 1500, the Vilnius diocese alone boasted 130 churches.
As dioceses were being established, churches were primarily constructed and endowed by rulers, and later by magnates and nobles. Rulers typically granted land to churches, generating income to sustain parish clergy and maintain buildings, while noble endowments provided funds and church supplies. Noble founders and their heirs often retained the jus patronatus, ensuring the parish was staffed with a clergyman.
Early Modern period (1500–1795)
16th century In 1501, Erazm Ciołek, a provost of Vilnius Cathedral, informed the Pope that Lithuanians preserved and respected their native language (), but also used Ruthenian for practical reasons, as nearly half of the Grand Duchy of Lithuania spoke it. In the 16th century, as the use of Polish increased, the Lithuanian language reached status of literary language. In 1599, Mikalojus Daukša published his Postil and, in its prefaces, noted the improved status of Lithuanian, crediting Bishop Merkelis Giedraitis for his efforts.
Between 1530 and 1540, Reformation and humanist ideas spread into the Grand Duchy, reaching its peak around 1570. Lutheranism dominated at first, followed by Calvinism. This era saw a rise in education and book publishing, including the first Lithuanian printed book – Catechism by Lutheran pastor Martynas Mažvydas in 1547. During the Counter-Reformation, the Catholic Church intensified efforts against Arianism and other Protestant movements. Protestant churches and schools were shut down, and much of the Lithuanian nobility, most notably the Nyasvizh branch of the Radziwiłł family, including Mikołaj Krzysztof Radziwiłł the Orphan and Cardinal Jerzy Radziwiłł, converted to Catholicism.