The project proposal, entrusted to Vitozzi and Castellamonte, consisted of an ellipsoidal structure raised above the floor of the church by means of a double ramp of eleven risers, raising the chapel by a meter and a half compared to the choir and two meters above the aisles. However, Vitozzi and Castellamonte's solution is rather intrusive. Between successions, wars and epidemics, the project was interrupted.