中译英：（用被动句）故宫建于明朝

...楼上两句互相借鉴一下就完美了

The Forbidden City was built/constructed in/during the Ming dynasty.

故宫还是叫 Forbidden city 来的多

The Imperial Palace was built in Ming dynasty.

Forbidden City is built in Ming dynasty.

The Forbidden City was built in the Ming Dynasty.