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A mappa mundi (Latin [ˈmappa ˈmʊndiː]; plural = mappae mundi; French: mappemonde; Middle English: mappemond) is any medieval European map of the world. Such maps range in size and complexity from simple schematic maps 25 millimetres (1 inch) or less across to elaborate wall maps, the largest of which to survive to modern times, the Ebstorf map, was around 3.5 m (11 ft 6 in) in diameter. The term derives from the Medieval Latin words mappa (cloth or chart) and mundus (world).
Around 1,100 mappae mundi are known to have survived from the Middle Ages. Of these, some 900 are found illustrating manuscript books and the remainder exist as stand-alone documents. 
Extant mappae mundi come in several distinct varieties, including:
- Zonal (sometimes Macrobian) maps
- Tripartite or "T-O" maps
- Quadripartite maps (including the Beatus maps)
- Complex maps
Medieval world maps which share some characteristics of traditional mappae mundi but contain elements from other sources, including Portolan charts and maps associated with Ptolemy's Geography are sometimes considered a fifth type, called "transitional mappae mundi".
Zonal maps are pictures of the East Hemisphere. Their purpose was to illustrate the concept that the world is a sphere with five climate zones:
- The northern frigid zone
- the northern temperate zone
- the equatorial tropical zone
- the southern temperate zone
- the southern frigid zone
Of these, only the two temperate zones at middle latitudes were believed to be inhabitable, and the known world was contained entirely within the northern temperate zone's Eastern Hemisphere. Because most surviving zonal maps are found illustrating Macrobius' Commentary on Cicero's Dream of Scipio (an excerpt of Cicero's De Re Publica), this type of map is sometimes called "Macrobian". In their simplest and most common form, Zonal mappae mundi are merely circles divided into five parallel zones, but several larger zonal maps with much more detail have survived.
T-O maps, unlike zonal maps, illustrate only the habitable portion of the world known to medieval Europeans, limiting their perspective to a relatively small portion of the Earth's northern hemisphere.  The landmass was illustrated as a circle (an "O") divided into three portions by a "T". These three divisions were the continents of Asia, Africa and Europe. The popularity of the Macrobian maps and the combination of T-O style continents on some of the larger Macrobian spheres illustrate that Earth's sphericity continued to be understood among scholars during the Middle Ages.
Quadripartite maps represent a sort of amalgam of the zonal and T-O maps by illustrating the three known continents separated by an equatorial ocean from a fourth unknown land, often called Antipodes. Fourteen large quadripartite maps are found illustrating different manuscripts of Beatus of Liébana's popular Commentary on the Apocalypse of St John. These " Beatus maps" are believed to derive from a single (now lost) original which was used to illustrate the missions of the twelve apostles of Jesus Christ. 
The "complex" or "great" world maps are the most famous mappae mundi. Although most employ a modified T-O scheme, they are considerably more detailed than their smaller T-O cousins. These maps show coastal details, mountains, rivers, cities, towns and provinces. Some include figures and stories from history, the Bible and classical mythology. Also shown on some maps are exotic plants, beasts and races known to medieval scholars only through Roman and Greek texts. Prior to its destruction in World War II, the Ebstorf map at 3.5 m (11 ft 6 in) across was the largest surviving mappa mundi. Today that honour is held by the surviving centre portion of the Hereford map which is 147 cm across and 175 cm top to bottom. Other important maps in this group are the Cotton or Anglo-Saxon map, the Psalter map and the Henry of Mainz map. The somewhat later mappae mundi that accompany the popular Polychronicon of Ranulf Higden should probably be viewed as degenerate forms of the earlier complex maps.
Complex mappae mundi include:
|The Albi or Merovingian map||c. 730||Médiathèque Pierre-Amalric, Albi ||29 cm × 23 cm (11.4 in × 9.1 in)|
|The so-called Vatican map of Isidore of Seville||776||
Vatican Library, Vatican City.
Lat. 6018, fol. 64 v.–65 r.
|The Anglo-Saxon or Cotton map||c. 1025–1050||
British Library, London.
Cotton Tiberius B.v, fol. 56v
|21 cm × 17 cm (8.3 in × 6.7 in)|
|The map of Theodulf of Orleans||11th century||Vatican Library, Vatican City. Reg. Lat. 123, fol. 143 v.–144 r.|
|The Sawley map||1190-1210||Corpus Christi College, Cambridge, MS 66, pt. 1||29.5 cm × 20.5 cm (11.6 in × 8.1 in)|
|The Vercelli Map||c. 1219||Archivio Capitolare, Vercelli||84 cm × 72 cm (2.76 ft × 2.36 ft)|
|The Ebstorf map||c. 1235||Found in
Ebstorf in 1843;
destroyed by bombing in Hanover in 1943
|3.56 m × 3.58 m (11.7 ft × 11.7 ft)|
|The Psalter map||13th century||British Library, London||14.2 cm × 9.5 cm (5.6 in × 3.7 in)|
|The Hereford map||c. 1300||Hereford Cathedral, Hereford||1.5 m (4.9 ft)|
|The Borgia Map||early 15th century||Vatican Library, Vatican City|
|The Fra Mauro map||1459–60||Museo Correr, Venice|
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. T-O maps were designed to schematically illustrate the three land masses of the world as it was known to the Romans and their medieval European heirs.
The larger mappae mundi have the space and detail to illustrate further concepts, such as the cardinal directions, distant lands, Bible stories, history, mythology, flora, fauna and exotic races. In their fullest form, such as the Ebstorf and Hereford maps, they become minor encyclopedias of medieval knowledge.
In her study, Brigitte Englisch shows that the medieval world maps (the mappae mundi) both from their concept and in their concrete practice are founded on a systematically geometric projection of the known world. The basis of this projection, however, is not geographical surveying but the harmonious order of God’s creation.[ citation needed] Using regular geometric forms like circles and triangles which are also regarded as religiously perfect, they created a coherent planispheric system. This quite basically presents the known world in its real geographic appearance which is visible in the so-called Vatican Map of Isidor (776), the world maps of Beatus of Liebana’s Commentary on the Apocalypse of St John (8th century), the Anglo-Saxon Map (ca. 1000), the Sawley map, the Psalter map, or the large mappae mundi of the 13th century (Hereford/Ebstorf).
In the central Middle Ages a new type of map developed as an aid to navigating the Mediterranean Sea. Known as " Portolan charts", these maps are characterized by extremely accurate coastlines with criss-crossing rhumb lines. A particularly famous example is the Catalan Atlas attributed to Abraham Cresques in the Bibliothèque nationale de France. During the late Middle Ages and with the coming of the Renaissance, western Europeans became reacquainted with the work of many ancient Greek scholars. In the field of geography and map-making, the coordinate system which Claudius Ptolemy outlined in the Geography became extremely influential. Over time maps influenced by these new ideas displaced the older traditions of mappae mundi. The last examples of the tradition, including the massive map of Fra Mauro, may be seen as hybrids, incorporating Portolan-style coastlines into the frame of a traditional mappa mundi.
- J. B. Harley (1987); Volume I, p. 286
- Kedwards, Dale (2020-09-18). The Mappae Mundi of Medieval Iceland. Cambridge: Boydell & Brewer. p. 2. doi: 10.2307/j.ctvxhrjnp. ISBN 978-1-78744-791-2.
- J. B. Harley (1987); Volume I' p. 357
- Edson, Evelyn (2007). The World Map 1300-1492. Baltimore: John Hopkins University Press.
- Woodward, David (1987).
"Medieval Mappaemundi" (PDF). In Harley, J. B. (ed.). The History of Cartography. Volume One: Cartography in Prehistoric, Ancient, and Medieval Europe and the Mediterranean. Chicago: University of Chicago Press.
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- Peter Barber (ed.) (2005) The Map Book, London
- Anna-Dorothee von den Brincken (1992) Fines terrae: die Enden der Erde und der vierte Kontinent auf den mittelalterlichen Weltkarten (MGH Schriften; 36). Hannover
- Crosby, Alfred W. (1996) The Measure of Reality: Quantification in Western Europe, 1250-1600. Cambridge: Cambridge University Press
- Evelyn Edson (1997) Mapping Time and Space: how medieval mapmakers viewed their world, London
- Brigitte Englisch (2002) Ordo orbis terrae: Die Weltsicht in den Mappae mundi des frühen und hohen Mittelalters, Berlin
- Conrad Rudolph, "'In Its Extraordinary Arrangement': Hugh of Saint Victor, the History of Salvation, and the World Map of The Mystic Ark," Restoration Through Contemplation: New Approaches to the Victorines, ed. Torsten Edstam and Robert Porwoll (2016)
- Modern Medieval Map Myths: The Flat World, Ancient Sea-Kings, and Dragons
- Detailed Fra Mauro Mappa Mundi 1459/60 at bottom of article
- Ancient World Maps
- 1452 Mappamundi by Giovanni Leardo held at the American Geographical Society Library, UW Milwaukee
- Mappa Mundi Hereford Digital Mappa Mundi exploration
- More information and Mappa mundi images can be found at the Cornell University: Persuasive Cartography: The PJ Mode Collection
- Discussion by Janina Ramirez and Peter Frankopan: Art Detective Podcast, 22 Mar 2017
- Virtual Mappa: Digital Editions of Early Medieval Maps of the World, edit. Martin Foys, Heather Wacha, et al. (Philadelphia, PA: Schoenberg Institute of Manuscript Studies, 2018): https://sims2.digitalmappa.org/36. DOI: 10.21231/ef21-ev82.