| 1 | This ancient observatory was built by the astronomers Wang Xun and Guo Shoujing. Its original name was the Administration of Heavenly Observatory. | |
| 2 | In 1930, Li Shanbang set up the Beijing Observatory, and in 1931, Jin Yongshen established the Nanjing Seismic Station. | |
| 3 | That is one of the oldest observatories of the world, 200 years older than Greenwich in England. | |
| 4 | According to one Chineae scholar, the observatory proved to be one of the lasting memories to the work of Catholics in China. | |
| 5 | Since they were excellent astronomers, some think that they also used their pyramid structures as observatories. |
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