Emperor Taizu of Song (21 March 927 – 14 November 976) personal name Zhao Kuangyin, courtesy name Yuanlang, was the founder and first emperor of the Song dynasty in China.
Source: Descriptions of the Works. Another Look at National Treasures: Select Masterpieces of Painting and Calligraphy in the Museum Collection (exhibit). Taipei: National Palace Museum. License: CC-PD-Mark PD-Art (PD-old-100)