Dynasty established by the Manchus from 1644-1912 considered the last imperial dynasty of China

The dynasty you are referring to is the Qing Dynasty. It was established by the Manchus in 1644 and lasted until 1912, marking the last imperial dynasty of China. The Qing Dynasty is notable for its territorial expansion, cultural achievements, and eventual challenges leading to its decline, culminating in the Xinhai Revolution, which led to the establishment of the Republic of China.