Koh Ker

City · c. 922–944 CE · in Southeast Asia

Capital of Khmer Empire (922–944).

Rouen (c. 922 CE): Capital of Duchy of Normandy (922–1071).
Lindong Town (c. 918 CE): Capital of Liao Dynasty (918–938).
Nin (c. 926 CE): Capital of Kingdom of Croatia (926–1098).
Biograd na Moru (c. 926 CE): Capital of Kingdom of Croatia (926–1098).
Jiangling County (c. 926 CE): Capital of Jingnan (926–963).
Daming County (c. 926 CE): Capital of Later Tang (926–935).
Guangzhou (c. 917 CE): Capital of Southern Han (917–971).
Shangjing Linhuangfu (c. 916 CE): Capital of Liao Dynasty (916–1125).
Liao Nanjing (c. 916–1153 CE): Capital of Liao Dynasty (916–1125).
Kaesong (c. 911 CE): Capital of Taebong (911–918), Goryeo (922–1392).

Around the same time and place

Bagan (200–1293 CE): Capital of Pagan Kingdom (850–1293).
Battle of Bach Dang (938) (938 CE): Ngô Quyền defeated a Southern Han fleet using iron-tipped stakes planted in the Bach Dang River, ending a millennium of Chinese rule over northern Vietnam.
Champa (c. 192–1832 CE): Collection of Cham polities along the coast of central and southern Vietnam, founded around 192 CE and gradually absorbed by Dai Viet.
Co Loa Citadel (c. 256 BCE – c. 965 CE): Capital of Âu Lac (256 BCE–207 BCE), Ngô Dynasty (947–965).
Yasodharapura (c. 802–1431 CE): Capital of Khmer Empire (802–1431).
Hariharalaya (c. 802–1431 CE): Capital of Khmer Empire (802–1431).