Stock Photo - Ptolemy (Claudius of Ptolemaeus c90-158), Alexandrian Greek astronomer and geographer. Ptolemy making observations using a quadrant. He is wrongly depicted as a king, as he was frequently confused with the Ptolemaic rulers of Egypt. British Museum.

Stock Photo: Ptolemy (Claudius of Ptolemaeus c90-158), Alexandrian Greek astronomer and geographer. Ptolemy making observations using a quadrant.

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