This is taken from Sarah Parvis, Marcellus of Ancyra and the Lost Years of the Arian Controversy (New York: Oxford University Press, 2006), specifically her summaries of events on pp. 72-83 and 100-101. A precise order cannot be given, for many of the early documents she would simply consider part of a “flurry of letters” (72). She believes Licinius’s ban on Christian synods took effect in approximately early 323.

The most notable innovation in this chronology is that Henos Sōmatos and Hē Philarchos (Urk 4b and 14) are considered to have been written at about the same time, circulating together, the former written by Athanasius on behalf of Alexander, and the latter serving as a cover letter from Bishop Alexander himself. This chart only goes until the year 325, at which point Parvis’s chronology seems to match Opitz’s.

Chart:
Parvis date the date given in Parvis, (see above), pp. 72-83
ancient source: gives the location in the sources from which we have taken the document.
translations: gives the location of translations. FCC translations may be accessed by clicking the link
appx date The editors of the 2007 edition of Athanasius Werke did not assign dates to these documents, only approximate order, so only approximate dates have been given in the first column, from AJW.
doc the document number in the 2007 edition of Athanasius Werke.Because the editors revised Opitz’s chronology, they gave the same documents new document numbers. For example, the old urkunde (urk.) 6 is now dokument (doc) 1.
Opitz date: the date assigned by Opitz. Click here to see the issues related to chronology.
urk.: provides the document number (Urk.) in Opitz’s Early Arian Documents (German: Urkunden). See the contents of this volume by page number
CPG: Clavis Patrum Graecorum reference number.
extra space
Parvis date description ancient source translations doc. date2007 urk. Opitz date CPG
322early spring Arius to Eusebius of Nicomedia Epiphanius, Panarion 69.6;
Theodoret, Historia ecclesiastica 1.5
(1.4 in the NPNF)
FCC;
New Eusebius, no. 283;
Sections 2-8: Hanson, p. 139,
Sections 4-5: Hanson, p. 6; NPNF2 vol. 3, p. 41		 15 323-324 1 c. 318 2025
322mid-year Fragment of a letter from Eusebius of Nicomedia to Arius Athanasius, De synodis 17.2 FCC;
Hanson, p. 31; NPNF2 vol. 4, p. 459		 16 323-324 2 c. 318 2046
322mid-year Eusebius of Caesarea to Euphration of Balanea Sections 1-3: Council of Nicaea, Session 5: Labbe vol. 7, col. 365; Sections 1-2: 2nd Council of Nicaea, Session 5: in Mansi vol. 13, col.176, 317;
Sections 4-5: Eusebius, Contra Marcellum1.4.40-41, 57; Athanasius,De synodis 17.3		 FCC 10 320-322 3 c. 318 3500
322mid-year Summary of letter of a Council in Bithynia Sozomen, Historia ecclesiastica 1.15.10 FCC; NPNF2 vol. 2, p. 252 3 318-320 5 c. 320 –
322mid-year Arius and his followers to Alexander of Alexandria Athanasius, De synodis 16;
Epiphanius, Panarion 69.7;
Hilary, De Trinitate 4.12		 FCC;
CLA no. 22;
Hanson, pp. 7-8; NPNF2 vol. 4, p. 458; NPNF2 vol. 9, p. 74;
New Eusebius, no. 284		 1 318-320 6 c. 320 2026
322end Eusebius of Nicomedia to Paulinus of Tyre Theodoret, Historia ecclesiastica 1.6
(1.5 in the NPNF)		 FCC; NPNF2 vol. 3, p. 42 4 318-320 8 c. 320 2045
323spring Alexander of Alexandria‘s encyclical letter on Arius‘ deposition Athanasius, De decretis 35;
Socrates, Historia ecclesiastica 1.6.;
Anonymous Church History 2.3.1-21		 FCC;
New Eusebius, no. NPNF2 vol. 4, pp. 69-72; NPNF2 vol. 2, pp.3-5;
282;Sections 2-3: Hanson, p. 16		 2.2 318-320 4b c. 318 2000
323spring Alexander of Alexandria to his clergy Athanasius, De decretis 34 FCC; NPNF2 vol. 4, p. 69 2.1 318-320 4a 318/9 2001
323spring Fragment of a letter from Alexander of Alexandria to all bishops Greek: Schwartz, pp. 265-7;
Syriac: Pitra, vol. 4, pp. 196-7		 FCC 14 320-322 15 324 2003
323spring Fragment a letter from Alexander of Alexandria to Sylvester of Rome Section 1: Richard, p. 82;
Section 2: Hilary: CSEL vol. 65, part 4, pp. 91-92;		 FCC 18 323-324 16 ? –
323spring Alexander of Alexandria to Alexander of Byzantium Theodoret, Historia ecclesiastica 1.4
(1.3 in the NPNF)		 FCC;
CLA no. 21; NPNF2 vol. 3, pp. 35-41;
Discussed in Hanson, p. 141-2
Discussed on New Eusebius, no. 285		 17 323-324 14 324 2002
323mid-year Eusebius of Caesarea to Alexander of Alexandria 2nd Council of Nicaea:
Labbe, vol. 7, col. 496 and Mansi, vol.13, coll. 316-7		 FCC 9 320-322 7 c. 320 3501
322-323 Athanasius of Anazarbus to Alexander of Alexandria Athanasius, De synodis 17.4 FCC; NPNF2 vol. 4, p. 458;
Discussed Hanson, p. 42		 11 320-322 11 c. 322 2060
322-323 Priest George to Alexander of Alexandria Athanasius, De synodis 17.5 FCC;
Hanson, p. 44; NPNF2 vol. 4, p. 459		 6 318-320 12 c. 322 3555
322-323 Priest George to the Arians in Alexandria Athanasius, De synodis 17.6 FCC;
Hanson, p. 44; NPNF2 vol. 4, p. 459		 7 318-320 13 c. 322 3556
323mid-year Fragment of a letter of Paulinus of Tyre Eusebius, Contra Marcellum
1.4.18-21, 49-51		 FCC;
Hanson, p. 45		 5 318-320 9 c. 320 2065
323autumn Summary of letter of a council in Palestine reinstating Arius Sozomen, Historia ecclesiastica 1.15.11 FCC; NPNF2 vol. 2, p. 252 8 320-322 10 c. 321/2 –
324fall Emperor Constantine to Alexander of Alexandria and Arius Eusebius, Vita Constantini, 2.64;
Sections 6-15: Socrates, Historia ecclesiastica 1.7;
Sections 6-15: Anonymous Church History 2.4		 FCC;
New Eusebius, no. 287; Coleman, no. 47;
NPNF2 vol. 1, pp. 515-8;
Sections 6-15: NPNF2 vol. 2, p. 6-7		 19 323-324 17 324Oct 2020
324late Letter of the Council of Antioch (325) Greek and Syriac: Schwartz, pp. 271-9;
Syriac: Schulthess, pp. 160-2		 FCC;
New Eusebius, no. 288;
Sections 8-11: Hanson, p. 149		 20 early 325 18 325early 8509
324late Fragment of a letter of Narcissus of Neronias to Chrestus, Euphronius and Eusebius Eusebius, Contra Marcellum, 1.4.39 FCC 21 325 19 325 –
325early Emperor Constantine’s letter calling the Council of Nicaea Greek: Schwartz, p. 289;
Syriac: Schulthess, p. 1		 FCC;
New Eusebius, no. 289;
Coleman, no. 48		 22 325 20 325Spring 8511

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