Egyptian blue pigment found in Augusta Raurica, Switzerland. The pigments were used in wall paintings. In Roman times, Egyptian blue was distributed throughout the Empire in a more or less standardised form of small balls of 15-20 mm in diameter. The painter could define the respective grain size and thus the shade of blue and the covering capacity of the ground up artificial pigment himself. On display at Museum Augusta Raurica 📷️ me #archaeology #RomanArchaeology