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  • Computus texts

    Manuscript Created date: 11th century

    One of the most important branches of medieval learning was computus, the science of calculating times and dates using a...

  • Constantine the African, De Melancholia

    Manuscript Created date: 3rd quarter of the 12th century

    A treatise on melancholy by Constantine the African (d. 1098) is inserted into a collection of popular historical and ph...

  • Continental copy of Geoffrey of Monmouth’s History...

    Manuscript Created date: 4th quarter of the 12th century

    The History of the Kings of Britain presents a legendary account of the history of Britain composed by the 12th-century...

  • Copernicus' celestial spheres

    Book Created date: 1515-32

    Since the time of Aristotle in the 5th century BCE, western learning advocated that heavenly bodies revolved around the...

  • Coronation charter of Henry I

    Charter, Manuscript Created date: 1100

    The granting of a charter of liberties by King John in 1215 (subsequently known as Magna Carta) was not without preceden...

  • Coronation Gospels

    Manuscript Created date: 4th quarter 9th century–1st quarter 10th century

    The first king of the English, Æthelstan (reigned 924–939), was a generous patron to churches, granting them relics, lan...

  • De Brailes Hours

    Manuscript Created date: c. 1240

    Produced in Oxford in around 1240, this small, portable manuscript (measuring only 150 x 125 mm) is the earliest extant...

  • De Lisle Psalter

    Manuscript Created date: c. 1308–40

    Taken from the De Lisle Psalter, this illustration tells the moral story The Three Living and the Three Dead in which th...

  • Decorated copy of Gratian’s Decretum

    Manuscript Created date: 1171–1180

    The Decretum, an encyclopedia of Church or canon law compiled by the Bolognese scholar, Gratian, in around 1140, became...

  • Decorated volume of St Augustine’s writings

    Manuscript Created date: 2nd half of the 10th century

    This collection of three works by the leading theologian of the early Church, St Augustine of Hippo (b. 354, d. 430), wa...

  • Decretals of Pope Boniface VIII

    Manuscript Created date: 2nd half of the 14th century

    As the head of the Catholic Church, the Pope led one of the most powerful institutions of the Middle Ages, making laws t...

  • Diagrammatic world map

    Map Created date: 1075

    The simplest medieval map of the world was the T-O map: a circle divided by a T into the three continents of Asia, Europ...

  • Dialogue of the Exchequer

    Manuscript Created date: 1200-99

    Richard fitz Nigel (1130-98), Bishop of Ely and author of The Dialogue of the Exchequer, has been described as a model c...

  • Dioscorides, Liber de virtutibus herbarium

    Manuscript Created date: 1st half of the 9th century

    The Greek physician, Dioscorides (b. c. 40, d. 90), wrote a treatise on the medical properties of plants, animal product...

  • Dunois Hours

    Manuscript Created date: c. 1439–1450

    A highly decorated French Book of Hours, commissioned by Jean d’Orléans (d. 1471), Count of Dunois. Among the bo...