What is "kleitias"

Kleitias ( Greek: Κλειτίας, sometimes rendered as Klitias) was an ancient Athenian vase painter of the black figure style who flourished c. 570–560 BCE. Kleitias' most celebrated work today is the François Vase (c. 570 BCE), which bears over two hundred figures in its six friezes. Painted inscriptions on four pots and one ceramic stand name Kleitias as their painter and Ergotimos as their potter, showing the craftsmen's close collaboration. A variety of other fragments have been attributed to him on a stylistic basis.