When was the Domesday book compiled?

The Domesday Book (pronounced "Doomsday") was commissioned by William the Conqueror in December 1085.The first finished copy was completed in August 1086 and contained details of some 13,400 towns, villages and households in England. The purpose of Domesday was to create a record of land ownership and value so William could set his taxes in order to prepare for war with the Danes. The original book has survived and is kept at the Public Records Office at Kew, in London. The Doomsday Book (Alternately known as Domesday, or Book of Winchester) is the record of the 1086 CE great survey of England . It was done for William I of England, AKA 'William the Conqueror'.

Domesday comes from the Old English word "dom" an accounting or reckoning. So Domesday or Doomsday was a Day of Reckoning. What were they checking for? The survey was an attempt to find out what or how much each landholder had in land and livestock, and evaluate its worth. The Reckoning was how much money each household would owe in taxes. The Dutch have this same use of reckoning in their word for a restaurant bill "Rekenen" a summing up.

About the book itself, it was written in Latin spiced up with Old English words for which there was no Latin equivalent. Copies still exist and it is on-line.