 The initial installation had the seeds spread across the floor of the Turbine Hall in a thin 10 cm layer.The seeds weigh about 10 metric tonnes and were made by artisans over two and a half years by 1,600 Jingdezhen artisans in a city where porcelain had been made for Chinese rulers and court for over one thousand years.Made by the traditional method for which the city is known, a thirty-stage process was employed.