lionofchaeronea:

Ancient Roman mosaic, depicting a skeleton (perhaps a memento mori) above the Greek maxim from Delphi
γνῶθι σεαυτόν

(”know thyself”).  Artist unknown; 1st cent. CE (?)  Found during excavations at the
convent of San Gregorio on the Via Appia, Rome; now in the National Museum, Rome.  Photo credit: Lessing Photo Archive.