Look also at Heron's automatic door, 1st century AD. Lighting a pyre changed the water pressure in a container, which then used basic hydraulic concepts to ope

Look also at Heron's automatic door, 1st century AD. Lighting a pyre changed the water pressure in a container, which then used basic hydraulic concepts to open a temple door. It is imagined that it would be used to imitate magic. Light the fire after a sacrifice and suddenly a higher power would open the door to the temple. "Any sufficiently advanced technology is indistinguishable from magic"