I guess it is a depiction of a miracle of resurrection. It could be saint Nicholas or similar to this story:
One story tells how during a terrible famine, a malicious butcher lured three little children into his house, where he killed them, placing their remains in a barrel to cure, planning to sell them off as ham. Nicholas, visiting the region to care for the hungry, saw through the butcher’s lies and resurrected the pickled children by making the sign of the cross.