Fowling in the marshes , Nebamun wall painting fragment, British Museum, London, UK    EGYPTIAN BLUE  the oldest known synthetic pigment. Bottom, infrared photoluminescence, bright white areas  correspond to the presence of high luminescent Egyptian blue.    Very stable synthetical pigment of varying blue color, ex 3000 years old exist. Copper calcium silicate the first synthetic pigment and the most widely used from the early dynasties in Egypt until the end of the Roman period in Europe.