Assyrian star planisphere found in the library of the Assyrian king Ashurbanipal (reigned 668-627 BCE) at Nineveh.
The function of this unique 13-cm diameter clay tablet, in which the principal constellations are positioned in eight sectors, is disputed but the texts and drawings appear to be astro-magical in nature.
Currently located at the British Museum, London.
(via scientificillustration)
