Richard Rowley (attr.) (18th century)
Pair of planetaria: Ptolemaic and Copernican, ca. 1700
Oxford, Christ Church College (on deposit at the Museum of the History of Science, Oxford, inv. 68353 and 19978)
These two hemispheres allow the observer to compare the Ptolemaic system, with the Earth in its centre, and the Copernican system, in which the Earth orbits around the Sun.