Buy a Krater from Ancient Greek Geometric Period. A Krater was a large in vase in Ancient Greece, particularly used for watering down wine. Geometric art is a phase of Greek art, characterized largely by geometric motifs in vase painting, that flourished towards the end of the Greek dark ages, circa 900 BC – 700 BC. Its center was in Athens and from there the style spread among the trading cities of the Aegean. Later, the main tragic theme of the wail declined, the compositions eased, the geometric shapes have become more freely, and areas with animals, birds, scenes of shipwrecks, hunting scenes, themes from mythology or the Homeric epics led Geometric pottery into more naturalistic expressions.