The photo shows the base for the sacrificial bowl (foculus), which had an unfolding mechanism. The object was built in the 2nd century CE in the Roman Empire, and was discovered in one of the Germanic graves in Zakrzów, in south-west Poland. The artifact is located in the National Museum in Warsaw.
It is believed that the base was looted during one of the barbarian invasions of the Roman Empire. The item has a stamp saying that the contractor was a certain Avitus.