• Theology Index
• Scripture
• Dogmatic
• Liturgical
• Moral
• Spirituality
• Primary Sources
• Theologians to Read
• Abbreviations

• Monumenta Germaniae Historica
  • Latin Text Archive
  • Digital MGH

• Acta Sanctae Sedis (ASS 1865-1908)
  • https://www.vatican.va/archive/ass/index_en.htm
• Acta Apostolicae Sedis (AAS 1909-)
  • https://archive.org/details/pub_acta-apostolicae-sedis
  • https://www.vatican.va/archive/aas/index_sp.htm

• Alberigo, G., et al. (eds.). 2013. Conciliorum Oecumenicorum Decreta . 3rd Ed. Bologna: EDB.
• Alberigo, G., et al. (eds.). 2006ff. Conciliorum oecumenicorum generaliumque decreta. Turnholt: Brepols. (CCCOGD)
  • I: From Nicaea I to Nicaea II (325-787)
  • II 1: The General Councils of Latin Christendom: From Constantinople IV to Pavia-Siena (869-1424)
  • II 2: The General Councils of Latin Christendom: From Basel to Lateran V (1431-1517)
  • III: From Trent to Vatican II (1545-1965)
  • IV 1-2: The Great Councils of the Orthodox Churches: From Constantinople 861 to Moscow 2000
  • IV 3: The Great Councils of the Orthodox Churches, Crete 2016
  • V 1-2: The General Councils of the Eastern Christian Churches
  • VI 1: Synods of the Churches of and after the Reformation: The Dawn of the Reformation (16th-17th Centuries) (2 Vols)
  • VI 2: Synods of the Churches of and after the Reformation: Ecclesia semper reformanda (17th-19th Centuries)
  • VI 3: Synods of the Churches of and after the Reformation: Alliances and Concords (19th-21st Centuries)
  • VII: General Index and Afterword
• Tanner, Norman P. 1990. Decrees of the Ecumenical Councils. 2 Vols. Washington, DC: Georgetown University Press.
• Shaff, Philip (ed.). 1900. The Seven Ecumenical Councils in NPNF II vol XIV. Michigan: Eerdmans.
• Hispanic Councils
  • https://clavis.brepols.net/clacla/OA/Details.aspx?id=DBB8D5D4D9524305800129577C499273
• African Councils
• Codex Canonum Ecclesiae Africanae (CPL-1765)
  • CCSL cxlix
  • PL 56: 863
• Labbé and Cossart. 1730. Sacrosancta Concilia ad Regiam editionem exacta.
  • Referred to as Labbé or Concilia.
  • Collection of councils and synods up to 1727.
  • http://patristica.net/labbe
• Mansi, Giovanni Domenico. 1774ff. Sacrorum Conciliorum Nova et Amplissima Collectio.
  • Referred to as Mansi.
  • Collection of councils and synods up to Vatican I.
  • Meant to improve upon Labbé.
  • http://patristica.net/mansi
• Joannou, Pericles-Pierre. 1962-1964. Fonti Discipline Generale Antique. Roma:Grottaferrata.
  • Vol 1.1: 2nd to 9th C (General Council Canons)
  • Vol 1.2: 4th to 9th C (Local Synod Canons)
  • Vol 2: 4th to 9th C (Greek Synod Canons)
  • Index

Some sites the have original text available:

• CCEL Christian Classics Library
• CCEL Scripture Search Tool
• The Latin Library - Christian Writers
• Patristic Scripture Use Database
• Patrologia Latina Database
• http://www.earlymedievalmonasticism.org/index.htm

• Patrologia Latina et Greca by Migne
  • https://www.patristica.net/latina/
  • http://www.documentacatholicaomnia.eu/1815-1875,_Migne,_Patrologia_Latina_01._Rerum_Conspectus_Pro_Tomis_Ordinatus,_MLT.html
  • Original massive collection
• Corpus Scriptorum Ecclesiasticorum Latinorum (CSEL)
  • Replaces many additions of Migne with critical editions
• Corpus Christianorum.
  • Series Graeca (CCSG)
  • Series Latina (CCSL)
    • Online Scans
  • Continuatio Mediævalis (CCCM)
    • Online Scans
  • Conciliorum Oecumenicorum Generaliumque Decreta (COGD)
  • Clavis series indexes all known works, information about the works, and in which series the work can be found.
  • Modern series to replace Migne
  • Many scans are available on archive.org

• Ante-Nicene Fathers (ANF), Nicene (NPNF1), and Post-Nicene Fathers (NPNF2)
  • Three part series from late 1800's
  • https://www.ccel.org/fathers.html
• The Fathers of the Church Series
  • CUA
  • Contemporary Translation
• The Fathers of the Church: Mediaeval Continuation
  • CUA

• Sources Chrétiennes (SC)
• Testi Patristici Collana