Zhangyuan was the earliest public office of Tianjin's Party and military committee. 

Located at No 59, Anshan Street, Heping district and covering an area of about 2,700 square meters, Zhangyuan was built with a classic Italian Renaissance style featuring high towers with arch doors and windows.

The building's sloped red-tile roof and bare brick walls give the building's facade great artistic value.

The structure even played host to Sun Yat-sen and Aisin-Gioro Puyi, China's last emperor. It is a cultural relic protection site of Tianjin, and it is under special protection for its historical significance.