The castle was later in large part reconstructed in 1433 by Charles des Marets.
The castle is composed of a quadrangular enclosure with round flanking towers and a lower court adjacent.
Although the town was largely destroyed by an Anglo-Dutch naval bombardment in 1694, the castle survived.
It was bought by the town in 1903 and today is home to the Dieppe museum with its collection of ivories (crucifixes, rosaries, statuettes, fans, snuffboxes, etc.
The Château de Dieppe has been officially classed since 1862 as a monument historique by the French Ministry of Culture.