The Delos mosaic of Dionysus riding a leopard in the House of Masks, is one of the highest concentrations of surviving mosaic artworks and it is dated to the last half of the 2nd century BC and early 1st century BC (Hellenistic period). Mosaic is one of the oldest and most beautiful art forms known to human civilization. The earliest decorated mosaics were made in Greece in the late 5th century BCE, with black and white pebbles and were inspired by Greek mythology. It was Ancient Greeks that pioneered the use of small stones to create small geometric patterns. With time, they learned how to arrange the pebbles in a picture so that shading and designs were created to make the pictures more realistic. They also used strips of lead to define lines in the pictures. Mosaics are still widely used for decorative purposes, but also as an art form in modern art. Today, we see mosaics not only on walls, ceilings, or floors, but also -if we look very closely- in every digital image which is made up of a grid of dots or picture elements called pixels. Together, the pixels form a numerical version of a two-dimensional image. No wonder Greeks were, and still are, innovative!