Callistus, Calistus,calistas, Callixtus, and Calixtus and Kallistos may refer to:
Mbarara City is a city in the Western Region of Uganda and the second largest city in Uganda after Kampala. The city is divided into 6 boroughs of Kakoba Division, Kamukuzi Division, Nyamitanga Division, Biharwe Division, Kakiika Division, Nyakayojo Division. It is the main commercial centre of most of south western districts of Uganda and the site of the district headquarters. In May 2019, the Uganda's cabinet granted Mbarara a city status, which started on 1 July 2020.
Kabale is a town in the Western Region of Uganda. It is the chief town of Kabale District, and the district headquarters are located there.
The Roman Catholic Archdiocese of Mbarara in Uganda covers an area of 10,980 km2 in southwestern Uganda. As of 2003, of the 2.2 million citizens in the area 856,168 are members of the Catholic Church. The archdiocese is subdivided into 25 parishes, and has 114 priests altogether. The archdiocese is the metropolitan for the dioceses of:
The Roman Catholic Diocese of Fort Portal is a diocese located in the city of Fort Portal in the ecclesiastical province of Mbarara in Uganda.
The Roman Catholic Diocese of Hoima is a diocese located in the city of Hoima in the ecclesiastical province of Mbarara in Uganda.
The Roman Catholic Diocese of Kasese is a diocese in the city of Kasese in the ecclesiastical province of Mbarara in Uganda.
The Roman Catholic Diocese of Benjamín Aceval is a diocese located in the city of Benjamín Aceval in the ecclesiastical province of Asunción in Paraguay.
Placidus Gervasius Nkalanga, OSB was a Tanzanian Prelate of the Roman Catholic Church. He was a monk of the St Maurus & St Placidus Hanga Abbey in Hanga, Ruvuma Region, Tanzania, a Benedictine monastery of the Congregation of Missionary Benedictines of Saint Ottilien. He lived there for 42 years, from his resignation from the episcopate in 1973 until his death in 2015.
The Uganda Episcopal Conference (UEC) or Episcopal Conference of Uganda is the local conference of Roman Catholic bishops in Uganda, established in 1960.
Maryhill High School is a catholic founded Girls’ O & A-level Boarding school located at Nyamitanga hill in Mbarara District in the Western Region of Uganda. The school is affiliated with the Roman Catholic Diocese of Mbarara. It was started in 1961 with the aim of promoting the education of the girl child to build the nation.
Vincent Kirabo Amooti, who was born on 1 October 1955, in Hoima District in the Western Region of Uganda, serves as the bishop of the Roman Catholic Diocese of Hoima, effective 30 November 2015.
Barnabas Rugwizangonga Halem ’Imana, was a Ugandan Roman Catholic priest who served as Bishop of the Roman Catholic Diocese of Kabale from 1969 until 1994.
Robert Marie Gay was a Canadian-born Ugandan Roman Catholic prelate. He was the second bishop of the Roman Catholic Diocese of Kabale from 1996 to 2003.
Paul Kamuza Bakyenga was a Ugandan Roman Catholic priest, who was the Archbishop of the Archdiocese of Mbarara, from 2 January 1999. Pope Francis accepted his resignation on 25 April 2020 and appointed Auxiliary Bishop Lambert Bainomugisha as the Archbishop of Mbarara, Uganda.
Lambert Bainomugisha, is a Ugandan Roman Catholic prelate, who is currently the Archbishop of the Roman Catholic Archdiocese of Mbarara, in Uganda, since 25 April 2020. He was formally installed as archbishop of the archdiocese later on 20 June 2020.
Callistus Rubaramira, is a Roman Catholic priest, who is the Bishop of the Roman Catholic Diocese of Kabale, in Uganda. He was appointed bishop on 15 March 2003.
Egidio Nkaijanabwo, is a Ugandan Roman Catholic priest who served as Bishop of the Roman Catholic Diocese of Kasese, from 6 March 1989 until 15 April 2014.
The Senatus of Uganda is the highest governing Council of Legion of Mary in Uganda that reports to Concilium Legionis Mariae. Legion of Mary is a voluntary organisation whose membership are members of the Roman Catholic Church at the service of Our Lady, the Blessed Virgin Mary.
Uganda 
