Beijing became more important again in the 10th century, when the Jin dynasty set its capital there. This city was destroyed by Mongol forces in 1215. Then in 1267, Mongols built a new city on the north side of the Jin capital, and called it "Great Capital" (大都, Dàdū), which was the beginning of modern Beijing. When Kublai Khan the Mongolian monarch, set up the Yuan dynasty, this city became his capital.