premise: The Musee de Dieppe, also known as the Ceteau-Musee, in the 15th-century chateau in the Rue de Chastes, has a good collection of model ships and carvings in ivory, dating from the 18th century when elephant tusks were a major import from Africa and Asia.
hypothesis: The Musée de Dieppe is a good location to visit for tourists who are interested in rare materials like gold and ivory.