Catechisms

The Shorter Catechism of St Philaret of Moscow (1824)

https://maksimologija.org/philaret-shorter-catechism/

The Longer Catechism of St Philaret of Moscow (1823).

https://maksimologija.org/the-longer-catechism-of-st-filaret-of-moscow-1823/

Indication of the Way into the Kingdom of Heaven, Saint Innocent of Alaska, 1833

https://www.stmaryofegypt.org/files/library/Indication.pdf

The Orthodox Confession of St Peter Mogila (1638–1642)

https://maksimologija.org/mogila-orthodox-confession/

1898 Edition:

https://ia801307.us.archive.org/25/items/cu31924029363094/cu31924029363094.pdf

An Exact Exposition of the Orthodox Faith, Saint John of Damascus (676-749)

***This is not the site of the authentic GOC of Greece, but of the schism that was formed in 2005.

https://www.omologitis.org/wp-content/uploads/2010/12/Faith.pdf

Additional Writings

Hexaemeron, Saint Basil (on creation of the cosmos)

https://www.elpenor.org/basil/hexaemeron.asp#google_vignette

audio:

https://archive.org/details/hexaemeron_1107_librivox

The Ladder of Divine Ascent, Saint John Climacus (ascetic life)

http://www.prudencetrue.com/images/TheLadderofDivineAscent.pdf

On the Mystagogy of the Holy Spirit, Saint Photios the Great (correct theology on the Holy Spirit begins with the Divine Persons, not the Divine Essence)

https://readthesaints.com/2022/03/21/st-photius-the-great-on-the-mystagogy-of-the-holy-spirit-and-the-epitomes/

or here:

https://myriobiblos.gr/texts/english/photios_mystagogy.html

On Purgatory, Saint Mark of Ephesus (against Roman errors)

https://thecatholiccottage.blogspot.com/2024/09/st-mark-of-ephesus-on-purgatory.html

The Triads, Saint Gregory Palamas (against scholastic theology)

https://www.agape-biblia.org/orthodoxy/Gregory_Palamas_The_Triads_Classics_of_Western_Spirituality.pdf

Synod of Jerusalem, Confession of Dositheus, Bishop of Jerusalem, 1672 (against the Calvinists) https://ia801304.us.archive.org/34/items/actsanddecreess00lucagoog/actsanddecreess00lucagoog.pdf