The building on the corner does not look like a museum. It looks like what it was, a merchant’s house from the seventeenth century, cream render going grey at the base, a wide gable with brown timber under the eaves, shutters that still work. You come over Pont Marengo from the other side of town, you notice the red banner, and without the banner you would keep walking. That is the Musée Basque et de l’histoire de Bayonne.