@ninawillburger
Since nothing else looks like a cross, I presume you're talking about the object at 2 o'clock? That doesn't seem very much like a Christian cross to me, as the vertical below the join should be longer.
Do we know that that shape was used as a symbol of Christianity in that place and time? I've seen that equal-arm-length cross used to represent a star, for example, but have no idea about that specific locale.