Portrait of Ptolemy
. Unknown engraver, in André Thevet, Les vrais portraits et vies des hommes illustres (1584), folio 87; scan via UQAM. Public domain (PD-Art, life+100/pre-1931 publication). Source and usage information on the linked Wikimedia file page. Source. Articles by others on the same topic
Ptolemy can refer to several historical figures, concepts, or entities, depending on the context. Here are a few prominent references: 1. **Claudius Ptolemy**: A Greek-Roman mathematician, astronomer, geographer, and astrologer who lived in the 2nd century AD in Alexandria, Egypt.