This Roman mosaic, created on Island of Kos in the 2nd Century BC, is now the centerpiece of a room in the reconstructed Palace of the Grand Masters in Rhodes. The mosaic features the head of Medusa, a mythological monster who is said to have turned onlookers to stone. She lost her head to the hero Perseus, who gave it to the goddess Athena to place on her shield. Medusa’s head eventually became a good luck totem in ancient Rome, warding off evil from any home or structure that displayed it. I zoomed in on the tiles to stress the details of the head itself, capturing its intricacy and colors. It may now be just a museum piece, but after almost 2,000 years, it seems to still glow with energy.