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Saturday 28 Apr
From March 15th to May 5th and September 9th to October 31st: tours every Saturday at 10 and 11 a.m. and 2, 3 and 4 p.m.; tours every Sunday at 2, 3 and 4 p.m.
From May 6th to September 8th: every day except Mondays and Sunday mornings at 10 and 11 a.m. and 2, 3, 4 and 5 p.m.
Ticket office at the Palais du Tau.