Final answer:
In 1227, two significant cities within the Mongol Empire were theZhongxing Fu, the capital of the Xia state, and Kyiv, the principal city in the Russia at the time.
Step-by-step explanation:
The Mongol Empire witnessed vast expansion under the leadership of the Chinggis Khan with numerous cities being brought under the Mongol control by 1227.
Two significant cities that were part of the Mongol Empire in 1227 are Zhongxing Fu, the capital of the Tangut State, Xia, which fell after a brutal six-month siege, and Kyiv (Kiev), the main city in Russia, which was captured by the Mongols and marked a shift in the balance of the power in the region.