Gyeongju

City · c. 378 CE · in Central Asia

Capital of Silla (378–681), Unified Silla (682–892).

Lanzhou (c. 387 CE): 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).
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).
Guwahati (c. 353 CE): Capital of Kamarupa Kingdom (353–1138).
Puhar (c. 353 CE): Capital of Kalabhra Dynasty (353–600).

Around the same time and place

Silla (c. 57 BCE – c. 935 CE): Kingdom with its capital at Gyeongju, traditionally founded in 57 BCE, that unified most of Korea in the 7th century.
Goguryeo (c. 37 BCE – c. 668 CE): Kingdom traditionally founded by Jumong in 37 BCE that grew to rule northern Korea and Manchuria.
Baekje (c. 18 BCE – c. 660 CE): Kingdom in southwestern Korea, traditionally founded in 18 BCE, a conduit of culture and Buddhism to Japan.
Kofun period (c. 250–538 CE): Era named for huge keyhole-shaped burial mounds such as the Daisen Kofun, reflecting the rise of the Yamato state.
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.
Stirrup (Feng Sufu tomb) (415 CE): The tomb of the Northern Yan official Feng Sufu, dated 415, contains the oldest surviving pair of metal-covered stirrups.
Wang Xizhi (303 CE – 361 CE): Calligrapher of the Eastern Jin, revered as the "Sage of Calligraphy".
Gwanggaeto the Great (374 CE – 413 CE): King of Goguryeo whose conquests greatly expanded the kingdom in Manchuria and Korea.