Skull Mosaic from Pompeii
Skull Mosaic from Pompeii[1] (House cum workshop I, 5, 2, triclinium).30 B.C. — 14 A.D. Inv. 109982. Mosaic Collection Naples of the Naples, National Archaeological Museum (inv. nr. 109982).
The mosaic represents the Wheel of Fortune and reversal of fortune. When turned it can make the rich (symbolized by the purple cloth on the left) poor and the poor (symbolized by the goat right) rich. It also marks precariousness, death lurks in every age, and life is hanging by a thread: if it breaks, it flies from the soul (symbolized by the butterfly), making all equal.
[Via upload.wikimedia.org and Morbid Anatomy]
