The only relic of Rouen’s medieval Jewish community, expelled by Philippe le Bel in 1306, is hidden underneath the staircase at the eastern end of the Palais de Justice courtyard. An impressive, stone-built Romanesque structure constructed around 1100, it is the oldest extant Jewish communal structure in Western Europe.
The tourist office runs two-hour tours (€6.50) at 3pm every Tuesday and at 10.30am on the last Friday of every month.
