Miniature map showing the domain of the legendary Christian king, Prester John. The map is dominated by the Nile River, which is shown emanating from twin lakes south of the equator. It was engraved by the brothers Ambrose and Ferdinand Arsenius who had been assistants to Frans Hogenburg and co-engravers of Ortelius' folio Theatrum. This series of maps was accompanied by text by Michel Coignet and was published by Jan B. Vrients. Latin text on verso.