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This is a small but well-presented museum that has taken over the Italian-style Petit Theatre. Fascinating film with interviews with those who were there. You will need about an hour to watch it all and look at the museum.
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the oldest house of the city.
It's a wetland reserve managed by APEI (L'Association de Parents d'Enfants Inadaptés de Dieppe), you'll find the ecology well documented, and a host of interesting artworks around the meadows. If you don't want to ride from Dieppe, you can hire bikes here and head on south along the Avenue Verte.