Which important survay took place in 1086?

The important survey that took place in 1086 was the Domesday Book, commissioned by William the Conqueror. This comprehensive record documented landholdings and resources across England, serving as a crucial resource for taxation and governance. It provided a detailed account of who owned what and helped establish the feudal system in post-Norman England. The Domesday Book remains a vital historical document for understanding medieval society and economics.