Take the following as truth: The elegant 17th- and 18th-century facades of the Palais des Ducs conceal the underlying Renaissance structures of the dukes' heyday, but many of their treasures remain to be seen inside, in the Mus??e des Beaux-Arts.
Then the following statement: "The Palais des Ducs concealed many hidden passageways leading to surprising locations." is true, false, or inconclusive?