The Metropolitan Archdiocese of Saigon or Archidioecesis Hochiminhopolitana is a Roman Catholic ecclesiastical territory in the south of Vietnam. By far the largest diocese in the country by population of people and second in the number of Catholics, yet like most big cities it only covers a small area of 2,390 km2 (920 sq mi).

Notre-Dame Cathedral Basilica of Saigon, officially Cathedral Basilica of Our Lady of The Immaculate Conception is a cathedral located in the downtown of Ho Chi Minh City, Vietnam. Established by French colonists who initially named it the Church of Saigon, the cathedral was constructed between 1863 and 1880. The name Notre-Dame Cathedral has been used since 1959. It has two bell towers, reaching a height of 58 meters (190 feet).