The York Mystery Plays, more properly the York Corpus Christi Plays , are a Middle English cycle of 48 mystery plays or pageants covering sacred history from the creation to the Last Judgment. They were traditionally presented on the feast day of Corpus Christi (a movable feast on the Thursday after Trinity Sunday, between 23 May and 24 June) and were performed in the city of York, from the mid-fourteenth century until their suppression in 1569. The plays are one of four virtually complete surviving English mystery play cycles, along with the Chester Mystery Plays, the Towneley/Wakefield plays and the N-Town plays. Two long, composite, and late mystery pageants have survived from the Coventry cycle and there are records and fragments from other similar productions that took place elsewhere. A manuscript of the plays, probably dating from between 1463 and 1477, survives at the British Library.
There is no record of the first performance of the mystery plays, but they were recorded as celebrating the festival of Corpus Christi in York in 1376, by which time the use of pageant wagons had already been established. The plays were organised, financed and performed by the York Craft Guilds ("Mystery" is a play on words, representing a religious truth or rite, and its Middle English meaning of a trade or craft). The wagons were paraded through the streets of York, stopping at 12 playing stations, designated by the city banners.
The cycle uses many different verse forms, most have rhyme, a regular rhythm with fairly short lines and frequent alliteration. The balance of critical opinion is in favour of several clerics being responsible for their authorship, one of whom is conventionally known as the "York Realist". It comprises 48 pageants that were originally presented on carts and wagons dressed for the occasion. In some accounts there are as many as 56 pageants. They told stories from the Old and New Testaments, from the Creation to the Last Judgement. The plays continued after the Reformation when in 1548, the feast of Corpus Christi was abolished in England. The plays were accommodated in to the new religious orthodoxy by cutting scenes honouring the Virgin, but were suppressed in 1569.