元史

History of the Yuan Dynasty, twenty third of the 24 dynastic histories 二十四史[Er4 shi2 si4 Shi3], compiled under Song Lian 宋濂[Song4 Lian2] in 1370 during the Ming Dynasty, 210 scrolls

surname Yuan / the Yuan or Mongol dynasty (1279-1368)

currency unit (esp. Chinese yuan) / first / original / primary / fundamental / constituent / part / era (of a reign) / meta- (prefix) / (math.) argument / variable / (Tw) (geology) eon

surname Shi

history / annals / title of an official historian in ancient China

New History of the Yuan Dynasty, completed by Ke Shaomin 柯劭忞[Ke1 Shao4 min2] in 1920, sometimes listed as one of the 24 Dynastic Histories 二十四史[Er4 shi2 si4 Shi3]