PLAN OF CATHEDRAL
- E, stairs leading to galleries.
- G, chapel of transept (vault with pendentives).
- M, aisles of choir.
- O, radial chapels of the twelfth century (modern windows).
SECTION OF CATHEDRAL
- A, roof of nave. B1, B2, B3, B4, transept.
- C, piers supporting the vault on the nave by means of flying buttresses.
- D, first aisles of nave and ambulatory.
- G, second aisles of nave.
- T, galleries running round the church.
GALLERIES OF THE CATHEDRAL