Sigmaringen

City · 1077 CE · in Europe

Capital of Principality of Hohenzollern-Sigmaringen (1806–1850).

Castelló d'Empúries (c. 1078 CE): Capital of County of Ampuria (1078–1402).
Valladolid (1072 CE): Capital of Crown of Castile (1236–1515), Pro-Habsburg Spain (1702–1708).
Nabadwip (c. 1072 CE): Capital of Sena Dynasty (1072–1235).
Polonnaruwa (c. 1072 CE): Capital of Kingdom of Polonnaruwa (1072–1236).
Isle of Man (c. 1085 CE): Capital of Kingdom of the Isles (1085–1176), Kingdom of Mann (1177–1266).
Castletown (c. 1085 CE): Capital of Kingdom of the Isles (1085–1176), Kingdom of Mann (1177–1266).
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).

Around the same time and place

Council of Clermont (1095 CE): Pope Urban II called on Western Christians to aid Byzantium and take Jerusalem, launching the First Crusade.
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.
William the Conqueror (c. 1028 CE – 1087 CE): Duke of Normandy who conquered England in 1066 and became its first Norman king.
Battle of Hastings (1066 CE): William, Duke of Normandy, defeated and killed King Harold II, beginning the Norman conquest of England.
University of Oxford (c. 1096 CE): Teaching existed at Oxford by 1096, making it the oldest university in the English-speaking world. It grew rapidly after Henry II barred English students from the University of Paris in 1167.
Trier (16 BCE – 1618 CE): Capital of Electorate of Trier (1333–1618).
Stephen I of Hungary (c. 975 CE – 1038 CE): First king of Hungary, crowned in 1000 or 1001, who converted his people to Christianity; venerated as Saint Stephen.
Cnut the Great (c. 990 CE – 1035 CE): Danish prince who became king of England, Denmark and Norway, ruling a North Sea empire.