You're all wrong, that's a prime chaotic resonator that fits 4 fossils for end game crafting clearly. The romans were farming end game and we're not even to maps yet.
It's a clever torch stand. If it's empty, you put your (long) torch in the top hole (stabilized by the bottom hole). If there is already one, you slide it two notches down instead and pivot the whole device (so it's balanced). Same with the third, but pick/pivot out of plane with the others. Works with one hand, keeps houses from burning down, great widget.