This brass armillary sphere incorporating a compass presents the structure of the solar system according to Copernicus. It was created in England in the early 18th century and originally formed part of the Kunstkammer collection that Peter intended to embody the idea of universal knowledge for all. The Kunstkammer was opened to the public in 1719. We know that not only was the Tsar skilled in the use of various astronomical devices, including solar, lunar and stellar clocks, but he even produced them himself. The first person back in his childhood to teach him how to handle such instruments was the Dutchman Franz Timmerman.