Fourth Century Christianity

The following is a list comparing side-by-side the alternative chronologies of the early Arian period. The links on the leftmost column will take you to a translation of the document. For more detaileds lists of each of the individual dating systems, click on the following links:

• H.-G. Opitz (1934)
• Rowan Williams (2002)
• Sarah Parvis (2006)
• Athanasius Werke – Urkunden vol.3.3 (2007)

Dok. (Urk.)	Vol.3.3 (2007) date	Opitz date	Williams date	Parvis date
1 (6)	318-320	c. 320	321	mid-year 322
2.1 (4a)	318-320	318/9	Jan./Feb. 325	Spring 323
2,2 (4b)	318-320	c. 318	early 325	Spring 323
3 (5)	318-320	c. 320	324	mid-year 322
4 (8)	318-320	c. 320	323	end 322
5 (9)	318-320	c. 320	324	mid-year 323
6 (12)	318-320	c. 322	321-323	322-323
7 (13)	318-320	c. 322	321-323	322-323
8 (10)	320-322	c. 321/2	321	Autumn 323
9 (7)	318-320	c. 320	325	mid-year 323
10 (3)	320-322	c. 318	321-323	mid-year 322
11 (11)	320-322	c. 322	321-323	322-323
12 (-)	320-322
13 a, b (-)	320-322
14 (15)	320-322	324	323	Spring 323
15 (1)	323-324	c. 318	321/2	early Spring 322
16 (2)	320-324	c. 318	321/2	mid-year 322
17 (14)	323-324	324	321/2	Spring 323
18 (16)	323-324	?		Spring 323
19 (17)	323-324	Oct. 324	Dec. 324	Fall 324
20 (18)	early 325	early 325	early 325	late 324
21 (19)	325	325		late 324
22 (20)	325	Spring 325		early 325
23 (21)	325	June 325
24 (22)	325	June 325
25 (23)	325	June 325
26 (24)	325	19 June 325
27 (34)	325*	333
28 (33)	325*	333
29 (25)	325	June 325
30 (26)	325	June 325
31 (27)	326-327	Nov./Dec. 325
32 (28)	326-327	Nov./Dec. 325
33 (29)	326-327	27 Nov. 327
34 (30)	326-327	late 327
35.1 (-)	327
35.2 (-)	327
36 (31)	327-329	late 327
37 (32)	327-329	early 328

*Timothy Barnes disagrees with this earlier dating, and instead supports the original date of 333. See “The Exile and Recalls of Arius,” The Journal of Theological Studies 60 (2009): 109-129.

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Last updated: 1-18-2025 by JSW

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