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The Paris Observatory is founded, 1667
PHD26A04_056

The Paris Observatory is founded, 1667

Paris Observatory
PHD26A05_195

Paris Observatory

Vatican Observatory
PHD26A07_117

Vatican Observatory

Cambridge observatory
PHD26A14_061

Cambridge observatory

Former observatory of Peking (China)
PHD26A01_227

Former observatory of Peking (China)

Former Peking observatory (China)
PHD26A01_198

Former Peking observatory (China)