Royal MS 14 C VII
Each town is distilled to its essential features, and each road is straight. It is more of a topological map than a topographical map, if you get my mathematical pun. It's a really telling example of how medieval people organized, prioritized, and represented information artistically, whether geography or scripture was the subject.
If you'd like to zoom in on it and view other pages, you can find the digitized manuscript online at the British Museum website: http://www.bl.uk/manuscripts/Viewer.aspx?ref=royal_ms_14_c_vii_f002r