Mystery plays and miracle plays are among the earliest formally developed plays in medieval Europe. Medieval mystery plays focused on the representation of Bible stories in churches as tableaux with accompanying antiphonal song. They told of subjects such as the Creation, Adam and Eve, the murder of Abel, and the Last Judgment. Often they were performed together in cycles which could last for days. The name derives from mystery used in its sense of miracle, but an occasionally quoted derivation is from ministerium, meaning craft, and so the 'mysteries' or plays performed by the craft guilds.

A church, church building, or church house is a building used for Christian worship services and other Christian religious activities. The earliest identified Christian church is a house church founded between 233 and 256.