Home China Tianjin Tours Purple Mountain Observatory Nanjing Purple Mountain Observatory Nanjing Purple Mountain Observatory Zijinshan Observatory is located on the third peak of Zhongshan (Purple Mountain), 250 meters above sea level. It was built in 1934. Nanjing Zijinshan Observatory is the headquarters. There are other observatories with the same name in Qinghai and other … Continue reading Nanjing Purple Mountain Observatory