The 1990s focussed on restoring the Jacobins' Tower (Tour des Jacobins), the façades of the Principal Governor's Palace (Grand Gouvernement - 15c/17c) and the 15th century Golden Crown Tower (Tour de la Couronne d'Or). The Military Saddlery (Harnachement - 18c) refurbished in 1997, was used for temporary exhibitions.
In 2000 work began on restoring the white tufa façades of the main ducal residence (Grand Logis - 15c) to their full glory. These are the oldest and most impressive sections of the building, providing a link between the Castle of the Dukes of Brittany and the Loire Châteaux. The bell tower has been rebuilt and the spires have been replaced on the Golden Crown Tower (Tour de la Couronne d'Or). The interior of the ducal residence has also been completely restored and redeveloped to house the museum.
The restoration has brought out the full power of the Breton feudal fortress and the elegance of the Renaissance ducal palace.
The castle reopened in 2007.