Zhengzhou Oldest existing planetarium of China - The Astronomical Observatory built in the Yuan Dynasty by Guo Shoujing in the Mount Song region. Thanks to "noumidai" of China.
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My worldwide collection of postcards written stamped and mailed to me from the country of origin. Trying to get 20 postcards sent from every country. Thank you. Xie xie. Merci. Gracias. Terima kasih.
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