“A mappa mundi […] is any medieval European map of the world. […] To modern eyes, mappae mundi can look superficially primitive and inaccurate. However, mappae mundi were never meant to be used as navigational charts and they make no pretence of showing the relative areas of land and water. Rather, mappae mundi were schematic and were meant to illustrate different principles. The simplest mappae mundi were diagrams meant to preserve and illustrate classical learning easily. The zonal maps should be viewed as a kind of teaching aid—easily reproduced and designed to reinforce the idea of the Earth’s sphericity and climate zones” (cited from Wikipedia).
What would a mappa mundi of our times look like? A modern equivalent of such a map would have to focus on those spaces of our planet that we have a less vivid imagination of than the physical shape of the world that in medieval times was a much less familiar view than it is today. The following gridded population cartogram generated over the whole surface of Earth could be such a contemporary depiction of the world. It divides the world into equal spaces of population realigning the map view to show the human planet in a similar way as mappae mundi showed the world centuries ago:

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