ANSWER
The "domesday book" was the written record of the survey of England commissioned by William the Conqueror in December 1085. The survey was primarily undertaken for purposes of tax assessment, and included complete descriptions and valuations of the land, buildings, livestock, mills, fishponds, and other resources for over thirteen thousand settlements comprising all of Norman England. It recorded ownership both as it existed in 1086, and as it had existed in 1066 under Edward the Confessor (before the Norman invasion). The name "domesday" is derived from "doomsday", in the sense that the record was the final judgement from which there was no appeal. The entire survey was completed in less than a year, making it one of the more remarkable administrative accomplishments of the Middle Ages. Today the "domesday book" resides in the Public Record Office in London.
WHO GOT IT RIGHT: Andie J, Steve Ironside, Allan Christensen, and George Waller.