Cocteau was assisted by the architect Jean Triquenot, painter Raymond Moretti, and ceramist Roger Pelissier.

[5][6][7] Inspired by the Torcello Cathedral and the Pantheon, Triquenot designed an octagonal chapel with large walls to accommodate the frescoes and an oculus.

The stained glass windows and the floor covered with blue ceramics, evoking the Mediterranean Sea, are the creation of Roger Pélissier.

[2] The floor is decorated with a Jerusalem cross and the motto of the Crusaders: "Dieu le veut" (God wills it).

A red Jerusalem cross, whose 5 wings symbolize the 5 wounds of Christ, is placed on the top of the chapel roof.