Forget fusty furnishings – the stripped, light-filled interior of the restored Château des Ducs de Bretagne houses multimedia-rich exhibits detailing the city's history. Computer terminals allow you to tour the old medieval city, juxtaposed with images of today. Other exhibits to look out for include sobering documentation of the slave trade, and vintage scale models of Nantes' evolving cityscape. There are also frequent temporary exhibitions (additional fee).