Glazed tiles (Chinese: 琉璃瓦) have been used in China since the Zhou Dynasty (c. 1046 – 256 BC) as a material for roofs. During the Song Dynasty, the manufacture of glazed tiles was standardized in Li Jie's Architecture Standard. In the Ming Dynasty and Qing Dynasty, glazed tiles became ever more popular for top-tier buildings, including palace halls in the Forbidden City, and ceremonial temples (for example the Heavenly Temple).