Jesuit observatory, Beijing, China: bronze astronomical instruments displayed on decorative stands. Photograph, ca. 1860. https://www.rawpixel.com/image/13971871/photo-image-person-sky-waterFree Image from public domain licenseJesuit observatory, Beijing, China: astronomical instruments on display. Photograph, ca. 1860. https://www.rawpixel.com/image/13999557/photo-image-plant-person-spaceFree Image from public domain licenseJesuit observatory, Beijing, China: bronze astronomical instruments with decorative bronze dragons. Photograph, ca. 1860. https://www.rawpixel.com/image/13973535/photo-image-dragons-person-artFree Image from public domain licenseJesuit observatory, Beijing, China: bronze astronomical instruments with decorative bronze dragons. Photograph, ca. 1860. https://www.rawpixel.com/image/13974590/photo-image-dragons-person-spaceFree Image from public domain licenseThe Campanile di Giotto, Florence, Italy: an astronomer. Photograph by Giacomo Brogi, ca. 1870, of a marble bas-relief by… https://www.rawpixel.com/image/14004730/photo-image-person-cross-artFree Image from public domain licenseObservatoire de Paris. Cours d'Astronomie. Ecole Polytechnique. Portefeuille des élèves. Cercle Meridien. Collimateur… https://www.rawpixel.com/image/14276185/photo-image-circle-public-domain-carFree Image from public domain licenseBorstbeeld van een van de vier hoofdwinden boven een wijzerplaat (2010) by Staeske Rebers https://www.rawpixel.com/image/13753145/photo-image-person-sky-goldFree Image from public domain license