Poitiers

City · c. 1206 CE · in Europe

Capital of County of Poitou (1206–1249).

Dresden (1206 CE): Capital of Electorate of Saxony (1547–1805), Kingdom of Saxony (1806–1808).
Auch (c. 1206 CE): Capital of County of Armagnac (1206–1496).
Trabzon (c. 1206 CE): Capital of Empire of Trebizond (1206–1461).
Arta (c. 1206 CE): Capital of Despotate of Epirus (1206–1479).
Xanadu (c. 1206–1439 CE): Capital of Mongol Empire (1206–1293), Northern Yuan (1375–1439).
Avarga (c. 1206 CE): Capital of Mongol Empire (1206–1235).
Andravida (c. 1206 CE): Capital of Principality of Achaea (1206–1432).
Banda Aceh (1205 CE): Capital of Sultanate of Aceh (1516–1903).
Koulikoro (c. 1202 CE): Capital of Sosso Empire (1202–1235).
Kalisz (c. 1210 CE): Capital of Duchy of Kalisz (1210–1219).

Around the same time and place

Magna Carta (1215 CE): Charter agreed by King John at Runnymede that limited royal power and became a foundation of constitutional law in the English-speaking world.
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.
Notre-Dame de Paris (1163 CE): Gothic cathedral on the Île de la Cité, begun in 1163, famous for its flying buttresses, rose windows and sculpture.
Francis of Assisi (c. 1181 CE – 1226 CE): Italian friar who embraced radical poverty and founded the Franciscan Order; one of the most venerated saints of Christianity.
Thomas Aquinas (1225 CE – 1274 CE): Dominican friar and theologian whose Summa Theologica synthesised Aristotelian philosophy with Christian doctrine.
Trier (16 BCE – 1618 CE): Capital of Electorate of Trier (1333–1618).
Hildegard of Bingen (1098 CE – 1179 CE): German Benedictine abbess, composer, visionary writer and naturalist, one of the best-known composers of medieval sacred music.
Thomas Becket (c. 1120 CE – 1170 CE): Archbishop of Canterbury murdered in his cathedral in 1170 after a conflict with Henry II; canonised and venerated as a martyr.