Rouen

City · c. 922 CE · in Europe

Capital of Duchy of Normandy (922–1071).

Koh Ker (c. 922–944 CE): Capital of Khmer Empire (922–944).
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

Reconquista (718–1492 CE): Centuries-long series of campaigns by Christian kingdoms to take the Iberian Peninsula from Muslim rule, ending with the fall of Granada in 1492.
Founding of the Holy Roman Empire (962 CE): Pope John XII crowned Otto I emperor in Rome, the conventional start of the Holy Roman Empire, which lasted until 1806.
Trier (16 BCE – 1618 CE): Capital of Electorate of Trier (1333–1618).
Alfred the Great (849 CE – 899 CE): King of Wessex who defended his kingdom against the Vikings, reorganised its defences and promoted learning in English.
Great Heathen Army (865–878 CE): A large coalition of Scandinavian warriors landed in East Anglia in 865, took York, and conquered Northumbria, East Anglia and much of Mercia before Alfred the Great defeated Guthrum at Edington in 878.
Badajoz (875 CE): Capital of Taifa of Badajoz (1010–1151).
Burgos (884 CE): Capital of Kingdom of Castile (1065–1235).
Hungarian conquest (c. 895 CE): Magyar tribes led by Árpád crossed the Carpathians and settled the Pannonian Basin, laying the foundation of the Hungarian state.