The Bronze Age was the period of human history in which the peoples of the known world used tools fashioned primarily from the metal bronze, a mixture of copper and tin. Dating back over a hundred years before the start of the Seshweay Calendar, it lasted for over a thousand years. Among its most prominent civilizations were the Empire of the Sesh, the Hu'ut Empire, Farou, Thearak, Krato, Hamakua, the Trilui, Baharr, Rutto, and Ferman.