Isfahan

City · c. 936 CE · in the Middle East

Capital of Ziyarid dynasty (936–979), Great Seljuk Empire (1040–1194).

Thingvellir National Park (c. 936 CE): Capital of Icelandic Commonwealth (936–1262).
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

Abbasid Caliphate (750–1258 CE): The Abbasid dynasty, descended from Muhammad's uncle, took the caliphate from the Umayyads and ruled from Iraq, presiding over the Islamic Golden Age.
Avicenna (c. 980 CE – 1037 CE): A Persian physician and philosopher, author of The Canon of Medicine and The Book of Healing, one of the most influential thinkers of the Islamic Golden Age.
Palmyra (c. 261–1929 CE): Capital of Palmyrene Empire (261–269).
Samanid Empire (819–999 CE): Persian dynasty ruling from Bukhara whose court fostered a revival of the Persian language and literature within the Islamic world.
Samarra (c. 836–892 CE): Capital of Abbasid Caliphate (836–892).
Al-Razi (c. 865 CE – 925 CE): A Persian physician and chemist from Rey who wrote influential medical encyclopedias and gave an early clinical description distinguishing smallpox from measles.
Kars (c. 886 CE): Capital of Bagratid Armenia (886–1045).
Al-Biruni (c. 973 CE – 1050 CE): Scholar from Khwarazm who wrote on astronomy, mathematics and geography and produced a detailed study of India after travelling with Mahmud of Ghazni.