Oil frog-lamp from Roman Egypt

This lamp is made up of two elements of pinkish terracotta laid one on top of the other and welded together to form a circular, flattened oil reservoir. The lid has a hole in the middle, through which the oil was poured. The decoration is molded around this hole. The lamp's spout is grafted onto it, itself pierced at the end with a hole for the wick.
The object's decoration evokes the body of a frog: the folded legs can be seen at the back and, on either side of the body's central opening, an incised grid supposed to represent the granular aspect of an amphibian's skin. The neck of the lamp represents the animal's neck and head.