Chatranga, a predecessor to Chess. The Indian Mathematician Brahmagupta presented the first instance of finite difference interpolation. 636: The Xumi Pagoda in Zhengding, China is built. 650: The first Chinese paper money is issued. 650s: After sailing from Ethiopia, Sa'd ibn Abi Waqqas allegedly introduced Islam to China, and established the first Islamic mosque of China in Guangzhou. 670s: Greek fire invented in Constantinople. Late 7th century: The stirrup introduced to Persia from China. In the 7th century the cookie was invented in Persia. References 1st millennium 07th century