Chongzhou, known as Chongqing County until 1994, is a county-level city of Sichuan Province, Southwest China. It is under the administration of the prefecture-level city of Chengdu. It is located about 37 km (23 mi) west-southwest of downtown Chengdu. The first Catholic synod in China was held in this city in 1803, convened by Gabriel-Taurin Dufresse.