The Jehovah’s Witnesses teach that Jesus (who they think was Michael the Archangel) was killed on an “execution stake.” They say the cross is a made up idea, and treat it as an idol. They say the word “cross” was added to later biblical manuscripts.
If memory serves me, I’ve seen a cross (two cross-members) from an archaeological dig.
Not all crucifixions were on crosses. Many were just poles and the arms of the condemned were above the head and nailed.......
Interestingly, Jehovah's Witnesses USED to use the cross in their literature.
Not sure when they changed to not using it at all, and making the claim about the "pole" or "stake" vs. the T-shaped cross.
From a technical issue, I don't know which would be more efficient.
Maybe the Romans used both.
But the Bible clearly mentions a cross.
So there had to be some *evidence* of it being used.