Mission whose constituent elements are as follows:

- Diagnostic studies (Dia)

- Preliminary Draft Summary (APS)

- Final Draft (DPA)

- Project studies (PRO)

- Assistance in the award of public works contracts (Act)

- Examination of compliance of execution studies to the project and visa (visa) + Synthesis

- Directorate of the execution of works contracts (Det)

- Assistance during acceptance operations and during the guarantee period of perfect completion (Aor)

Complementary mission element:

- Coordination Ssi

- Heritage mediation

- Scheduling, management and coordination of the site (Opc) (PSE)

Duration: from the date of notification to the end of the guarantee period of perfect completion or after extension of this period when the last reservation is lifted, i.e. an estimated duration of 48 months

Firm slice:

- Phase 0: Emergency works: Restoration of the painted decorations of the vault of the choir

- Phase 1: Building Sanitation

- Phase 2: Restoration of the nave and its aisles

- phase 3: Restoration of the eastern parts of the building (crossing, apse, axis chapel, ambulatory and crypt)

Optional slices (bone strengthening):

- Optional tranche No. 1: Restoration of the Potier Chapel

- Optional tranche No. 2: Movable objects

- Optional tranche No. 3: Restoration of the North Chapels

3.A. The Fresneau chapel

3.B. The Citoys and Bardeau chapels

3.C. The chapels of Amboise and Gillier

- Optional tranche No. 4: Restoration of the choir chapels

- Optional tranche No. 5: Redevelopment of the sacristy