Zhengyangmen, Beijing 1903-1911. The Zhengyangmen
was considered the most important entrance to the inner
city of old Beijing. Originally, the middle gate was closed
off for imperial use only. Commoners would have to use
the informal side gates in the tower. However, after
severe damage inflicted upon the gate during the Boxer
Rebellion, the middle gate was opened up for common
use and never closed again.