After the conquest of England, William instituted a feudal system in the country, whereby all estates formally belonged to the Crown; the king then appointed lords over these vast estates, but they were subject to duties and obligations (financial and military) to the king.
Na conquista de Inglaterra, Guillerme creou un sistema feudal no país, polo cal todas as propiedades formalmente pertencían á Coroa; o rei entón nomeaba señores sobre estas vastas propiedades, que estaban suxeitos a deberes e obrigacións (financeiros e militares) ao rei.