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1000 CE
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1200 CE
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1000 CE: The tower keep is built at Ivry-la-Bataille Castle, Normandy, France.
1000 CE: The castle and tower keep of Langeais, central France, are built.
1020 CE: The tower keep of Loches Castle, central France, is built.
1072 CE: The tower keep of Chepstow Castle, Wales is built.
1074 CE: The tower keep is begun at Colchester Castle, Essex, England.
1078 CE - 1100 CE: The White Tower of the Tower of London is built, a project begun by William the Conqueror.
1095 CE - 1115 CE: The hall keep is added to Norwich Castle, Norfolk, England.
1125 CE: The tower keep of Arques Castle, Normandy, France is built by Henry I of England.
1127 CE - 1136 CE: The tower keep is built at Rochester Castle, England.
1130 CE: Etampes Castle is built, near Paris, France. The tower keep is circular on the outside and square inside.
1138 CE: The tower keep of Farnham Castle, Surrey, England is built.
1142 CE: A tower keep is added to Hedingham Castle, Essex, England.
1150 CE - 1175 CE: The Caesar's Tower castle keep at Kenilworth Castle, Warwickshire, England is built.
1157 CE - 1169 CE: The tower keep of Scarborough Castle, Yorkshire, England is built.
1165 CE - 1173 CE: Orford Castle, Suffolk, England is built and has a circular tower keep with attached rectangular turrets.
1168 CE - 1178 CE: A tower keep is added to Newcastle Castle, England.
1170 CE - 1189 CE: Henry II extends Dover Castle in southern England, adding outer walls and a keep.
1180 CE - 1190 CE: The tower keep is built at Conisbrough Castle, Doncaster, England.
1190 CE: A square tower keep is added to Carrickfergus Castle, Antrim, Northern Ireland.
1199 CE - 1219 CE: Sir William Marshal adds a circular tower keep to Pembroke Castle, Wales.
1200 CE: The tower keep of Trim Castle, County Meath, Ireland is built.
1200 CE: The tower keep of Barnard Castle, County Durham, England is built.
1205 CE: Philip II of France adds a tower keep to Chinon Castle, France.
1206 CE: A round tower keep is built into the curtain walls of Gisors, Normandy, France.
1225 CE: A circular tower keep is built at Chateau de Coucy, northern France
1240 CE: Dirleton Castle, East Lothian, Scotland is built with a massive circular tower keep.
1317 CE: The Eagle Tower, a castle keep, is completed at Caernarfon Castle in Wales.