After the Roman retreat during the fifth century AD, Sark was probably an outpost of one or other Breton-speaking kingdoms until 933, when it became part of the Duchy of Normandy.
Despois da retirada romana durante o século V, Sark foi probablemente un posto de avanzada dun ou outro reino de lingua bretoa ata 933, cando se converteu en parte do Ducado de Normandía.