T-O maps

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  15. T-O maps
Scope note
Early diagramatic renderings of the known world. The first known form of these was the late 7th or early 8th century work of Isidore of Seville. The design consists of a ring of encircling sea-ocean divided in its interior into three continents for Asia, Europe, and Africa, understood as a capital letter T within an O. It is also known as an Isidoran map or a "T and O map" or "O–T map" or "T–O map."
T-O maps
Accepted term: 01-Dec-2025