Stelae (Chinese: 窸; pinyin: b?i) have been the major medium of stone inscription in China since the Tang dynasty (618 - 907 CE). Chinese stelae are generally rectangular stone tablets upon which Chinese characters are carved intaglio with a funerary, commemorative, or edifying text. They can commemorate talented writers and officials, inscribe poems, portraits, or maps, and frequently contain the calligraphy of famous historical figures.