Domesday

noun, singular proper noun

a comprehensive record of the extent, value, ownership, and liabilities of land in England, made in 1086 by order of William I.

Middle English: an old spelling of doomsday, which was apparently applied because the book was regarded as a final authority.

1. the last day of the world's existence.

   Bede believed that the time of doomsday is concealed from mankind

Old English dōmes dæg (see doom, day).