Thingvellir National Park

City · c. 936 CE · in Europe

Capital of Icelandic Commonwealth (936–1262).

Isfahan (c. 936 CE): Capital of Ziyarid dynasty (936–979), Great Seljuk Empire (1040–1194).
Arles (c. 936 CE): Capital of Kingdom of Arles (936–1378).
Taiyuan (c. 936 CE): Capital of Later Jin (936–946), Northern Han (960–979).
Hyrcania (c. 936 CE): Capital of Ziyarid dynasty (936–979).
Ray (c. 936 CE): Capital of Ziyarid dynasty (936–979), Great Seljuk Empire (1040–1194).
Vedeno (940 CE): Capital of Caucasian Imamate (1828–1858).
Algiers (944 CE): Capital of Regency of Algiers (1706–1830), Free French (1940–1943), People's Democratic Republic of Algeria (1963–today).
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).

Around the same time and place

First Althing (930 CE): Iceland's general assembly first met at Þingvellir in 930, making it one of the oldest parliaments in the world.
Brian Boru (c. 941 CE – 1014 CE): High King of Ireland who broke Norse power and unified much of the island; killed at the Battle of Clontarf.
Erik the Red settles Greenland (c. 985 CE): Exiled from Iceland, Erik the Red explored southwest Greenland and around 985 led a fleet of settlers there, founding the Norse Eastern Settlement at Brattahlíð.