A Lectionary is a book or listing that contains a collection of scripture readings for Christian worship.

Throughout history, many varying lectionaries have been used in different parts of the Christian world. Until the Second Vatican Council, most Western Christians (Roman Catholics, Old Catholics, Anglicans,anthonyies,Lutherans, and Methodists who employed the Lectionary of Wesley) used a lectionary that repeated on a one year basis. This lectionary provided readings for Sundays and, in those Churches that celebrated the festivals of saints, feast-day readings.

Since the Second Vatican Council, the revised lectionary of the Roman Catholic Church has been a foundation block upon which many contemporary

• A reading from the Hebrew Scriptures;
• A Responsorial Psalm;
• A reading from one of the Epistles;
• A reading from one of the Gospels.

The Lectionary is generally orgnaized into a three-year cycle of readings. The first three readings change from week to week to complement the Gospel reading. The Gospel reading is coordinated with the day's observance according to the Liturgical calendar; during common time the Gospel reading is usually chronological from week to week or grouped thematically by teaching. The reading cycle is denoted by letter as:

• Year A: Readings from the Gospel of Matthew.
• Year B: Readings from the Gospel of Mark.
• Year C:
  
  
  
  Readings from the Gospel of Luke.

The Gospel of John is always read for Easter, and is utilized for other liturgical seasons including Advent, Christmas, and Lent where appropriate.

For churches that hold weekday services, the Lectionary provides a two-year cycle of shorter readings:

• A reading from the Hebrew Scriptures or the Epistles
• A Responsorial Psalm
• A reading from one of the Gospels.

These readings are generally much shorter than the weekend readings.

In the Eastern Churches (those united with Rome, the Eastern Orthodox, the Oriental Orthodox, and those bodies not in communion with either but still practicing eastern liturgical customs) tend to retain the use of a one year lectionary in their liturgy, and follow a different liturgical calendar (to an extent) than the western Churches. Most Eastern Lectionaries provide for an Epistle and a Gospel to be read on each day of the year.

In some churches, the Lectionary is carried in the entrance procession by a lector. In the Roman Catholic Church, it is prohibited to process with the Lectionary, but a Gospel Book may be carried by a lector or deacon. When a Gospel Book is used, the first three readings are read from the Lectionary, while the Gospel Book is used for the final reading.

The Lectionary is not to be confused with a missal or sacramentary; while the Lectionary contains scripture readings, the others contain the appropriate prayers for the service.

See also

• Revised Common Lectionary
• Mass (liturgy)
• Liturgical year
• Gospel Book