14th-century cycle of 25 scriptural plays, or mystery plays (mystery play), performed at the prosperous city of Chester, in northern England, during the Middle Ages. They are traditionally dated about 1325, but a date of about 1375 has also been suggested. They were presented on three successive days at Corpus Christi (Corpus Christi, Feast of), a religious feast day that falls in summer. On the first day there was a performance of plays 1–9 (including the fall of Lucifer, key episodes in the Old Testament, the Nativity, and the adoration of the Wise Men); on the second day a performance of plays 10–18 (including the flight into Egypt, Jesus' ministry, the Passion and Crucifixion, the Descent into Hell, and the arrival in paradise of the virtuous who had died before the Redemption had been achieved); and, finally, on the third day a performance of plays 19–25 (including the Resurrection, the Ascension of Christ into heaven, the Descent of the Holy Spirit, the coming of the Antichrist, and the Last Judgment).

The Chester plays are rich in content, yet tell the great story of human redemption more simply than the other surviving cycles of York, Wakefield, and “N-Town.” The text, containing more than 11,000 lines of verse, has been preserved in five manuscripts, which are kept in the Bodleian Library, Oxford, Eng.; the Huntington Library, San Marino, Calif., U.S.; and the British Museum, London. The cycle has been published with commentary and glossary as The Chester Mystery Cycle, 2 vol. (1974–86), edited by R.M. Lumiansky and David Mills.