or
; while the so-called cross which Constantine and his troops are said to have seen above the midday sun was admittedly the monogram of Christ,
or
, which was admittedly an adaptation of the solar wheel, as will be shown further on; and it was as tokens of the conquest of Rome by his Gaulish troops, that Constantine, as their leader, erected one of these symbols in the centre of the Eternal City, and afterwards placed upon his coins the crosses
,