 Yan Liben was the personal portraitist to the Emperor Taizong, and his most notable works include the "Thirteen Emperors Scroll" (歷代帝王圖).The landscape ("shan shui") painting technique developed quickly in this period and reached its first maturation.Li Sixun (李思訓) and Li Zhaodao (李昭道) (father and son) were the most famous painters in this domain.