The Roman Catholic Diocese of Chengdu/Chengtu Latin: Cemtuan(us), Chinese: 成都 is a suffragan Latin diocese in the Ecclesiastical province of Roman Catholic Archdiocese of Chongqing covering southwestern China's Sichuan area, yet depends on the missionary Roman Congregation for the Evangelization of Peoples.
Its episcopal see is the Cathedral of the Immaculate Conception (Pinganqiao Church), in the city of Chengdu, at Chengdu Ping'An Bridge Catholic Church, No. 25 Ping'an Alley, Chengdu City, Sichuan, China. 中文地址：四川成都青羊区平安巷9号.
The diocese, based in Chengdu, covers 4 cities (Chengdu, Deyang, Guangyuan and Mianyang) and 37 districts and counties, in an area of 54,900 square kilometers.
No more statistics available.
Established on October 15, 1696 as Apostolic Vicariate of Szechwan 四川, on territory split off from the Apostolic Vicariate of Fujian 福建Gained territories twice : in 1715 from the suppressed Apostolic Vicariate of Kweichow 貴州 and in 1755 from the suppressed Apostolic Vicariate of Yunnan 雲南Lost territories repeatedly : on 1840.08.28 to (re)establish Apostolic Vicariate of Yunnan 雲南 and on 1846.03.27 to (re)establish Apostolic Vicariate of Kweichow 貴州 and establish Apostolic Vicariate of Lhassa 拉薩Renamed on April 2, 1856 as Apostolic Vicariate of Northwestern Szechwan 四川西北, having lost territory to establish Apostolic Vicariate of Eastern Szechwan 四川東境)Lost more territory on 1860.01.24 to establish the Apostolic Vicariate of Southern Szechwan 南四川Renamed again on December 3, 1924 after its see as Apostolic Vicariate of Chengdu 成都Lost territory on 1929.08.02 to establish the Apostolic Vicariate of Shunqingfu 順慶府Promoted on April 11, 1946 as Diocese of Chengdu 成都 (all Roman Rite; so far members of Latin congregations, long European missionaries)
Apostolic Vicars of Szechwan 四川Artus de Lionne, Paris Foreign Missions Society (M.E.P.) (born France) (November 30, 1700 - death August 2, 1713) - never resident in diocese; Titular Bishop of Rosalia (1687.02.05 – 1713.08.02), initially as Coadjutor Vicar Apostolic of Szechwan 四川 (1687.02.05 – 1696.10.20)Johannes Müllener, Lazarists (C.M.) (born Germany) (December 8, 1716 - death December 17, 1742), Titular Bishop of Myriophytos (1715.09.02 – 1742.12.17)Luigi Maggi, Dominican Order (O.P.) (born Italy) (December 17, 1742 - August 20, 1743), Titular Bishop of Baris in Hellesponto (1738.10.08 – 1743.08.20), initially as Coadjutor Vicar Apostolic of Szechwan 四川 (1738.10.08 – 1742.12.17)Joachim Enjobert de Martiliat, M.E.P. (born France) (August 20, 1743 - death 24 August 1755), Titular Bishop of Echinus (1739.10.02 – 1755.08.24), initially as Coadjutor Vicar Apostolic of Yunnan 雲南 (1739.10.02 – 1743.08.20)Father Pierre-Jean Kerhervé, M.E.P. (born France) (1762.07.27 – death 1766.01.22 not possessed), Titular Bishop of Gortyna (1762.07.27 – 1766.01.22)Bishop François Pottier, M.E.P. (born France) (January 24, 1767 – death September 28, 1792), Titular Bishop of Agathopolis (1767.01.24 – 1792.09.28)Saint Bishop Gabriel Taurin Dufresse, M.E.P. (born France) (徐德新) (November 15, 1801 – death September 14, 1815), Titular Bishop of Tabraca (1798.07.24 – 1815.09.14), initially as Coadjutor Vicar Apostolic of Szechwan 四川 (1798.07.24 – 1801.11.15)Louis Fontana, M.E.P. (born Italy) (July 1817 – July 11, 1838), Titular Bishop of Sinita (1817.05.24 – 1838.07.11), later Apostolic Vicar of Hupeh and Hunan 湖廣 (China) (1838 – death 1838.07.11)Jacques-Léonard Pérocheau, M.E.P. (born France) (July 11, 1838 – April 2, 1856 see below), Titular Bishop of Maxula (1817.09.30 – 1861.05.06), initially as Coadjutor Vicar Apostolic of Szechwan 四川 (1817.09.30 – 1838.07.11)Apostolic Vicars of Northwestern Szechwan 四川西北Jacques-Léonard Pérocheau, M.E.P. (see above April 2, 1856 – death May 6, 1861)Annet-Théophile Pinchon, M.E.P. (born France) (May 6, 1861 – death October 26, 1891), Titular Bishop of Polemonium (1859.04.23 – 1891.10.26), initially as Coadjutor Apostolic Vicar of Northwestern Szechwan 四川西北 (China) (1859.04.23 – 1861.05.06)Marie-Julien Dunand, M.E.P. (born France) (April 21, 1893 – death August 4, 1915), Titular Bishop of Calœ (1893.08.21 – 1915.08.04)Jacques-Victor-Marius Rouchouse, M.E.P. (born France) (骆书雅) (January 28, 1916 – December 3, 1924 see below), Titular Bishop of Ægeæ (1916.01.28 – 1946.04.11)Apostolic Vicar of Chengdu 成都Jacques-Victor-Marius Rouchouse, M.E.P. (骆书雅) (see above April 11, 1946 – see promoted December 20, 1948 see below)Suffragan Bishops of Chengdu 成都Jacques-Victor-Marius Rouchouse, M.E.P. (骆书雅) (see above December 3, 1924 – death April 11, 1946)Henri-Marie-Ernest-Désiré Pinault, M.E.P. (彭道传) (July 14, 1949 – retired 1983), died 1987John Li Xi-ting (李熙亭) (first Chinese native incumbent) (1958 – death 1989.05.28) - no papal mandateMichael Liu Xian-ru (劉顯儒) (1992 – death 1998.10.25) - no papal mandateJoseph Tang Yuan-ge (唐遠閣) (2015.12 [2016.11.30] – ...).
