472240 The Peking Observatory, illustration from Jean Baptiste du Halde\'s \'Description g矇ographique, historique, chronologique, politique, et physique de l\'Empire de la Chine et de la Tartarie chinoise\', 1785 (engraving) by French School, (18th century); Private Collection; (add.info.: Jean Baptiste du Halde (1674-1743) Jesuit historian, he complied his \'Description g矇ographique, historique, chronologique, politique, et physique de l\'Empire de la Chine et de la Tartarie chinoise\' from the reports of Jesuit missionairies in China. Image shows the Ancient Observatory in Beijing, built in 1442.); French, out of copyright.