the Middle Ages
US /ðə ˌmɪd.əl ˈeɪ.dʒɪz/
UK /ðə ˌmɪd.əl ˈeɪ.dʒɪz/
1.
the period of European history from the fall of the Roman Empire in the West (5th century) to the fall of Constantinople (1453), or, more narrowly, from c. 1000 to c. 1453
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Life was very different during the Middle Ages.
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Many castles were built in Europe during the Middle Ages.