Do you mean if it's a sin like in the bible when people were praying to idols and God destroyed them cause they should only be praying to him? I don't think so, since those are statues of the said gods or their apostles/prophets. By praying to the statue the person is praying to the appropriate god, so nothing wrong with it.

There were people however that thought praying to church icons for example is a sin in that manner. In the Byzantine empire the anti icon movement were especially strong early on in the first millennium BC. At one point they even managed to ban all visual depictions of christian saints and Christ himself for about a hundred years if I'm not mistaken.

In Islam to this day it's unacceptable to draw Allah, though nobody knows how Allah looks anyway