Petrarch conceived of the idea of a European "Dark Age" which later evolved into the tripartite periodization of Western history into Ancient, Post-classical and Modern.
From the Winchester Bible, showing the seven ages within the opening letter "I" of the book of Genesis. This image is the final age, the Last Judgement. For images of the other six ages, see External links below.

The Six Ages of the World (Latin: sex aetates mundi), also rarely Seven Ages of the World (Latin: septem aetates mundi), is a Christian historical periodization first written about by Augustine of Hippo circa AD 400.

- Six Ages of the World

But perhaps the most widely discussed periodization scheme of the Middle Ages was the Six Ages of the World, where every age was a thousand years counting from Adam to the present, with the present time (in the Middle Ages) being the sixth and final stage.

- Periodization
Petrarch conceived of the idea of a European "Dark Age" which later evolved into the tripartite periodization of Western history into Ancient, Post-classical and Modern.

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The Cross of Mathilde, a crux gemmata made for Mathilde, Abbess of Essen (973–1011), who is shown kneeling before the Virgin and Child in the enamel plaque. The figure of Christ is slightly later. Probably made in Cologne or Essen, the cross demonstrates several medieval techniques: cast figurative sculpture, filigree, enamelling, gem polishing and setting, and the reuse of Classical cameos and engraved gems.

Middle Ages

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In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similar to the post-classical period of global history.

In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similar to the post-classical period of global history.

The Cross of Mathilde, a crux gemmata made for Mathilde, Abbess of Essen (973–1011), who is shown kneeling before the Virgin and Child in the enamel plaque. The figure of Christ is slightly later. Probably made in Cologne or Essen, the cross demonstrates several medieval techniques: cast figurative sculpture, filigree, enamelling, gem polishing and setting, and the reuse of Classical cameos and engraved gems.
A late Roman sculpture depicting the Tetrarchs, now in Venice, Italy
Barbarian kingdoms and tribes after the end of the Western Roman Empire
A coin of the Ostrogothic leader Theoderic the Great, struck in Milan, Italy, c. AD 491–501
A mosaic showing Justinian with the bishop of Ravenna (Italy), bodyguards, and courtiers.
Reconstruction of an early medieval peasant village in Bavaria
An 11th-century illustration of Gregory the Great dictating to a secretary
Map showing growth of Frankish power from 481 to 814
Charlemagne's palace chapel at Aachen, completed in 805
10th-century Ottonian ivory plaque depicting Christ receiving a church from Otto I
A page from the Book of Kells, an illuminated manuscript created in the British Isles in the late 8th or early 9th century
Medieval French manuscript illustration of the three classes of medieval society: those who prayed (the clergy) those who fought (the knights), and those who worked (the peasantry). The relationship between these classes was governed by feudalism and manorialism. (Li Livres dou Sante, 13th century)
13th-century illustration of a Jew (in pointed Jewish hat) and the Christian Petrus Alphonsi debating
Europe and the Mediterranean Sea in 1190
The Bayeux Tapestry (detail) showing William the Conqueror (centre), his half-brothers Robert, Count of Mortain (right) and Odo, Bishop of Bayeux in the Duchy of Normandy (left)
Krak des Chevaliers was built during the Crusades for the Knights Hospitallers.
A medieval scholar making precise measurements in a 14th-century manuscript illustration
Portrait of Cardinal Hugh of Saint-Cher by Tommaso da Modena, 1352, the first known depiction of spectacles
The Romanesque Church of Maria Laach, Germany
The Gothic interior of Laon Cathedral, France
Francis of Assisi, depicted by Bonaventura Berlinghieri in 1235, founded the Franciscan Order.
Sénanque Abbey, Gordes, France
Execution of some of the ringleaders of the jacquerie, from a 14th-century manuscript of the Chroniques de France ou de St Denis
Map of Europe in 1360
Joan of Arc in a 15th-century depiction
Guy of Boulogne crowning Pope Gregory XI in a 15th-century miniature from Froissart's Chroniques
Clerics studying astronomy and geometry, French, early 15th century
Agricultural calendar, c. 1470, from a manuscript of Pietro de Crescenzi
February scene from the 15th-century illuminated manuscript Très Riches Heures du Duc de Berry
Medieval illustration of the spherical Earth in a 14th-century copy of L'Image du monde
The early Muslim conquests
Expansion under Muhammad, 622–632
Expansion during the Rashidun Caliphate, 632–661
Expansion during the Umayyad Caliphate, 661–750

Medieval writers divided history into periods such as the "Six Ages" or the "Four Empires", and considered their time to be the last before the end of the world.

Tripartite periodisation became standard after the 17th-century German historian Christoph Cellarius divided history into three periods: ancient, medieval, and modern.