Maragheh

City · c. 898 CE · in Europe

Capital of Sajid Dynasty (898–929), Ilkhanate (1294–1335).

Székesfehérvár (c. 900 CE): Capital of Principality of Hungary (900–999), Kingdom of Hungary (1000–1543).
Esztergom (c. 900 CE): Capital of Principality of Hungary (900–999), Kingdom of Hungary (1001–1256).
Andorra la Vella (900 CE): Capital of Principality of Andorra (1815–today).
Benabarre (c. 900 CE): Capital of County of Ribagorza (900–1084).
Roda de Isábena (c. 900 CE): Capital of County of Ribagorza (900–1084).
Pskov (903 CE): Capital of Pskov Republic (1348–1510).
Jeonju (c. 892 CE): Capital of Hubaekje (892–935).
Bratislava (907 CE): Capital of Kingdom of Hungary (1526–1546).
Hotan (c. 888 CE): Capital of Kingdom of Khotan (888–1006).
Ardanuç (c. 888 CE): Capital of Kingdom of the Iberians (888–999).

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.
Palmyra (c. 261–1929 CE): Capital of Palmyrene Empire (261–269).
Al-Khwarizmi (c. 780 CE – 850 CE): A Persian mathematician and astronomer at the House of Wisdom whose works introduced algebra and Hindu–Arabic numerals to later scholars; the word 'algorithm' derives from his name.
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.
Amol (c. 866 CE): Capital of Zaydi Alid dynasties (866–928), Ziyarid dynasty (936–979).
Kars (c. 886 CE): Capital of Bagratid Armenia (886–1045).
Isfahan (c. 936 CE): Capital of Ziyarid dynasty (936–979), Great Seljuk Empire (1040–1194).