The  Diocese  of  Bangalore  was  formerly  a  part of  the Mysore  Mission  which  was  separated  from Pondicherry  in 1845 and entrusted to the Fathers of the PARIS FOREIGN MISSION SOCIETY (Missions Etrangeres de Paris).

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The   Mysore   Mission   was   erected   into   a   Vicariate Apostolic in 1850 and entrusted to Msgr Charbonnaux, MEP, who was at that time coadjutor Bishop of Pondicherry.

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In 1886, the Bull “Humanae  Salutis  Auctor”  elevated the  Vicariate  of  Mysore  to  the  rank  of  a  Diocese. Mysore was the title and Bangalore was the headquarters of the Diocese.  All  along  the  second  part  of  the  19th century and the first half of the 20th the Foreign Mission Society, under successive Bishops, developed a network of churches, schools, convents and colleges. Thus they prepared Bangalore to become an Archdiocese, a great capital and a cosmopolitan city.

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The Christian infrastructure of Bangalore owes much to the French Fathers, Servanton Circle in Cantonment area and The Briand Square near City Market perpetuate the memory of the Founders. The above two, along with the following, viz., SAINT FRANCIS XAVIER’S CATHEDRAL whose fi st Parish Priest was Fr. Jarrige in 1842, and SAINT JOSEPH’S CHURCH built by Fr. Bigot-Beauclair in 1851-1852, SAINT MARY’S BASILICA, started as the  fi rst church in Bangalore, was built as we see it now, by Fr. Kleiner between 1875 and 1882 before he was made Bishop. The SACRED HEART CHURCH was completed in 1895 by Fr. Combret. The then Cathedral, SAINT PATRICK’S CHURCH was completed by Fr. Gailhot in 1844 and renovated by the illustrious Fr. Tabard who was its Parish Priest from 04.12.1891 till 12.04.1925. He is buried inside the church. The SAINT PETER’S SEMINARY at Malleswaram, now a Philosophy and Theology Faculty and Centre for Canon Law, was established in Pondicherry in 1777 by Bishop Brigot, first MEP Superior of the Malabar Mission. The Seminary was shifted to Bangalore in 1934.

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SAINT JOSEPH’S COLLEGE was founded in 1882 by MEP Fathers. It was handed over to the Society of Jesus on 1st June, 1937.

By the Bull “Felicius Increscente” (happily growing), Pope Pius XII created on 13th February, 1940 the Diocese of Bangalore, carving it out the Diocese of Mysore Most Rev. Bishop Maurice Bernard Benoit Joseph was appointed as the fi rst Bishop of the newly erected Diocese of Bangalore and St. Francis Xavier’s Church was designated as the Cathedral. Most Rev. Dr. Thomas Pothacamury who was the Bishop of Guntur was transferred to Bangalore and became the First Indian Bishop of Bangalore in 1942. The Cathedral was consecrated on 24th January 1948.

On 19th Septmber, 1953, Pope Pius XII issued the Decree “Mutant Res” (things are changing) by which Bangalore was elevated to Archdiocese.

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On 14th November, 1988, the Diocese of Shimoga was created to which Bangalore Archdiocese ceded the civil district of Chitradurga. Prior to the erection of the SyroMalabar Diocese of Mandya in 2015, and Syro-Malankara Diocese of Exarchate of St. Ephrem, Khadki in 2015, the Archdiocese had all the three Rites under one local Ordinary. The Archdiocese promoted mutual support and coordination among all the ritual Churches. The spiritual and temporal needs of all the three Rites were adequately taken care of, and the system to interact between among each other was also well established.

Thus the Archdiocese of Bangalore now comprises six civil districts of Bengaluru Urban, Bengaluru Rural, Chikkaballapura, Kolara, Ramanagara and Tumakuru. These cover an area of 27,123 sq km with a total population of 1,71,65,595 as per the census of 2011. Currently the Catholic Christian population is 3,83,097 (2018).