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Mightn't this page cause some confusion with Emperor Constantine III (r.641), the short-lived son of Heraclius? john 05:38 29 May 2003 (UTC)
Yes, but there are two Constantine III, one eastern and one western. And he was not a usurper - for he was formally recognised as an emperor. John Norwich, in his Byzantine History, solves the problem by calling him "Constantius III", but why he, unlike the eleven other Constantines, should have his name treated differently, is an open question. Constantine II ruled only in Gaul and was certainly not a "Byzantine" emperor. I suggest Constantine III "west" and "east".Sponsianus 21:54, 19 May 2007 (UTC)
Whether a ruler is a usurper or legitimate is defined by his success. Constantine III was ultimately suppressed and is generally known as a usurper. As it says in the article, Honorius only recognised him for one year (409) under constraint. I see no need to change the article on this account.
I haven't read the Norwich book yet. I cannot see any excuse for calling him "Constantius III" - "Constantius" is a completely different name. --Jmullaly (talk) 04:57, 20 February 2010 (UTC)
I beg your pardon, when I wrote the above I'd forgotten a thing. Constantius III is not just a different name, he was a completely different person, second husband of Galla Placida who co-ruled with Honorius briefly in 421. --Jmullaly (talk) 04:46, 25 March 2010 (UTC)
Constitutionaly, a Roman Emperor was considered legitimate when the ruling Augustus decreed him to be one - duress has nothing to do with it. Constantine III's name was recorded in the Fasti, legitimising him and his elevation. He also cannot be degraded from the rank of co-emperor just because Honorius turned against him in 410, otherwise we'd have to remove legitimate emperors such as Licinius, just because Constantine I turned against him. Constantine III is virtually unique amongst the usurpers for gaining this official recognition, and this is noted by the fact that he is called Constantine III, not simply Constantine. (Please note - just because there was a Byzantine Emperor called Constantine III who ruled in 641 is not an indication that this Constantine was considered illegitimate. What it reflects is that the Eastern and Western Empires after 395 are considered separate entities, and that both Constantines are the third in succession in that eastern or western imperial succession). Further, Jones and Martindale in the PLRE Vol. 2 identify him as a legitimate co-emperor. Oatley2112 (talk) 21:23, 29 October 2010 (UTC)