The Carolingian reconstruction (9th century) The Carolingian reconstruction - The miraculous healing of count Conrad (9th century) The Carolingian reconstruction - The construction of the crypt according to Heiric of Auxerre (9th century) The foundation (5th century) The basilica of Clotild (6th century) The Carolingian reconstruction (9th century) Medieval renovations (11th to 14th centuries) Crises and renewals (17th to 20th centuries)