![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/T_and_O_map_Guntherus_Ziner_1472.jpg/640px-T_and_O_map_Guntherus_Ziner_1472.jpg&w=640&q=50)
T and O map
Type of medieval world map / From Wikipedia, the free encyclopedia
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A T and O map or O–T or T–O map (orbis terrarum, orb or circle of the lands; with the letter T inside an O), also known as an Isidoran map, is a type of early world map that represents world geography as first described by the 7th-century scholar Isidore of Seville (c. 560–636) in his De Natura Rerum and later his Etymologiae (c. 625)[1]
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/7/70/T_and_O_map_Guntherus_Ziner_1472.jpg/640px-T_and_O_map_Guntherus_Ziner_1472.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Hereford_Mappa_Mundi_1300.jpg/320px-Hereford_Mappa_Mundi_1300.jpg)
A later manuscript added the names of Noah's sons (Sem, Iafeth and Cham) for each of the three continents (see Biblical terminology for race).[1] A later variation with more detail is the Beatus map drawn by Beatus of Liébana, an 8th-century Spanish monk, in the prologue to his Commentary on the Apocalypse.