Ptolemy's map of Ireland
Ancient map of Ireland / From Wikipedia, the free encyclopedia
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Ptolemy's map of Ireland is a part of Ptolemy's "first European map" (depicting the British Isles) in the series of maps included in his Geography, which he compiled in the second century AD in Roman Egypt and which is the oldest surviving map of Ireland. Ptolemy's own maps do not survive, but is known from manuscript copies made during the Middle Ages and from the text of the Geography, which gives coordinates and place names. Ptolemy almost certainly never visited Ireland, but compiled the map based on military, trader and traveller reports and his own mathematical calculations. Given the creation process, the time period involved and the fact that the Greeks and Romans had limited contact with Ireland, it is considered remarkably accurate.