[Quix]

I’m somewhat skeptical of emphatic statements about that long ago.

Plausibly correct.

Possibly not AS correct as assumed.

[CurlyDave]

I’m somewhat skeptical of emphatic statements about that long ago.

Actually the history of the use of the cross as a symbol is better known than a lot of stuff. And, we are discussing something that Roman historians noted also.

I am not arguing against your skepticism, but we are talking about a period when there is a written recorded history.

Google "Christian cross history" and see what comes up.