Zhengyangmen was first built in 1419 during the Ming Dynasty and once consisted of the gatehouse proper and an archery tower, which were connected by side walls and together with side gates, formed a large barbican. The gate guarded the direct entry into the imperial city. During the Boxer Rebellion of 1900, the gate sustained considerable damage when the Eight-Nation Alliance invaded the city. The gate complex was extensively reconstructed in 1914. The Barbican side gates were torn down in 1915. After the Communist victory in 1949, the Zhengyangmen gatehouse was occupied by the Beijing garrison of the People's Liberation Army. The military vacated the gatehouse in 1980.