Navahrudak

City · 1100 CE · in Europe

Capital of Grand Duchy of Lithuania (1236–1449).

Tarsus (c. 1099 CE): Capital of Armenian Kingdom of Cilicia (1099–1374).
Ryazan (1095 CE): Capital of Principality of Ryazan (1097–1240), Ryazan (1453–1520).
Sivas (c. 1094 CE): Capital of Danishmendids (1094–1178).
Zagreb (1094 CE): Capital of Independent State of Croatia (1941–1944), Republic of Croatia (1992–today).
Iznik (c. 1094 CE): Capital of Sultanate of Rum (1094–1307), Nicaean Empire (1206–1261).
Nicaea (c. 1094–1261 CE): Capital of Sultanate of Rum (1094–1098), Nicaean Empire (1206–1261).
Stari Ras (c. 1094–1168 CE): Capital of Grand Principality of Serbia (1094–1168).
Santiago de Compostela (c. 1111 CE): Capital of Kingdom of Galicia (1111–1125).
Tripoli (c. 1111 CE): Capital of County of Tripoli (1111–1289).
Minsk (c. 1111 CE): Capital of Principality of Minsk (1111–1313), Republic of Belarus (1992–today).

Around the same time and place

East–West Schism (1054 CE): Break in communion between the Church of Rome and the Church of Constantinople, dividing Catholic and Eastern Orthodox Christianity.
Trier (16 BCE – 1618 CE): Capital of Electorate of Trier (1333–1618).
Varangians to the Greeks (c. 800–1100 CE): Scandinavian traders and warriors travelled from the Baltic up the Neva and Volkhov past Novgorod, portaged to the Dnieper and sailed down past Kiev to the Black Sea and Constantinople.
Chernihiv (c. 1056 CE): Capital of Principality of Chernigov (1056–1240).
Volodymyr (c. 1056 CE): Capital of Principality of Volhynia (1056–1201), Halych-Volhynia occupation (1199–1240), Principality of Galicia-Volhynia (1202–1240), and 1 more.
Pereiaslav (c. 1056 CE): Capital of Principality of Pereyaslavl (1056–1239).
Sigmaringen (1077 CE): Capital of Principality of Hohenzollern-Sigmaringen (1806–1850).
Walk to Canossa (1077 CE): Emperor Henry IV did penance before Pope Gregory VII at Canossa to have his excommunication lifted, a key moment of the Investiture Controversy.