Lanzhou

City · c. 387 CE · in Central Asia

Capital of Western Qin (387–431).

Pingcheng District (c. 387 CE): Capital of Northern Wei (387–533).
Ravenna (c. 395 CE): Capital of Western Roman Empire (395–476), Ostrogothic Kingdom (500–553).
Mediolanum (c. 395–402 CE): Capital of Western Roman Empire (395–402).
Gyeongju (c. 378 CE): Capital of Silla (378–681), Unified Silla (682–892).
Zhangye (c. 397 CE): Capital of Northern Liang (397–439).
Soba (400–1504 CE): Capital of Alodia (600–1504).
Faras (c. 400–650 CE): Capital of Nobatia (400–650).
Turkistan (401 CE): Capital of Kazakh Khanate (1599–1729).
Braga (c. 414 CE): Capital of Kingdom of the Suebi (414–585), Kingdom of Galicia (911–1125).
Guwahati (c. 353 CE): Capital of Kamarupa Kingdom (353–1138).

Around the same time and place

Mogao Caves (c. 366 CE): Buddhist cave temples near Dunhuang created from the 4th to 14th centuries, with thousands of square metres of murals.
Admonitions Scroll (c. 400 CE): Painted handscroll illustrating a text on the conduct of court ladies, attributed to Gu Kaizhi of the Eastern Jin capital at Nanjing; the surviving version, probably a later copy, is in the British Museum.
Battle of Fei River (383 CE): Eastern Jin forces defeated a much larger army of the Former Qin, preserving the southern dynasties.
Ye (c. 337–576 CE): Capital of Later Zhao (337–351), Northern Qi (555–576).
Ji (c. 337 CE): Capital of Former Yan (337–370).
Jiankang (c. 426 CE): Capital of Liu Song Dynasty (426–479), Southern Qi (480–502), Chen Dynasty (561–589).