Simplify the following text for a Grade 8 native English-speaking person.
Original: The earliest reference to the site was in the Domesday Book survey of 1086 , wherein the `` minster '' of Southwark seems to be under the control of Bishop Odo of Bayeux ( William the Conqueror 's half-brother ) .
Simplified: The earliest reference to the site was in the Domesday Book survey of 1086 . The ` Minster ' of Southwark seems to be under the control of Bishop Odo of Bayeux ( William the Conqueror 's half-brother ) .