File:Diagrammatic T-O World Map - 12th Century.jpg
From The British Library;
Record Number - c5933-06;
Shelfmark - Royal 12 F. IV;
Page Folio Number - f.135v.
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Same, cropped
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Whole page, from different sample.
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Same map in 12th century Isidorian manuscript. The world is portrayed as a circle divided by a 'T' shape into three continents; Asia, Europe, and Africa.
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The T and O scheme: According to Augustine of Hippo (354-430), "Asia's size equals the sum of Europe's and Africa's".