Motu Proprio Summorum Pontificum (2007)
Pope Benedict XVI's Letter to Bishops on Summorum Pontificum
Instruction Universae Ecclesiae (2011)
Motu Proprio Ecclesia Dei (1988)
Organizations:
Una Voce America
Foederatio Internationalis Una Voce
Pontifical Commission Ecclesia Dei
Canons Regular of St. John Cantius
Priestly Fraternity of St. Peter
Institute of Christ the King Sovereign Priest
Church Music Association of America
Juventutem
Coalition Ecclesia Dei
Resources:
Tutorial on the Extraordinary Form of the Mass (from St. John Cantius)
Usus Antiquior Divine Office
Traditional Latin Mass Directory (from Ecclesia Dei Coalition)
Music for the Liturgy (from Corpus Christi Watershed)
Liturgical Planning Resources (from Cantica Nova Publications)
Choral Public Domain Library
Sheet Music, Chant Books, Hymns for Download (from CMAA)
Catechism of the Catholic Church
Holy Bible (parallel English / Latin / Greek)
Church Fathers
Summa Theologica
Catholic Encyclopedia (1917)
Blogs
What Does the Prayer Really Say?
The New Liturgical Movement
The Chant Cafe
The Recovering Choir Director
New Advent
Other Documents:
Missale Romanum (Tridentine rite)
Missale Romanum 1962
General Instruction of the Roman Missal
Chirograph on Sacred Music (Pope Bd. John Paul II - 2003)
Letter to Artists (Pope Bd. John Paul II - 1999)
Ordo cantus officii (1983)
Voluntati obsequens (1974)
Musicam sacram (Latin, 1967)
Musicam sacram (1967)
Sacrosanctum Concilium (Second Vatican Council - 1963)
Veterum sapientia (Pope Bd. John XXIII - Latin, 1961)
De musica sacra (Latin, 1958)
De musica sacra et sacra liturgia (1958)
Musicae sacrae (Pope Ven. Pius XII - 1955)
Mediator Dei (Pope Ven. Pius XII - 194)
Tra le sollecitudini (Pope St. Pius X - 1903)
