Below is a picture which was intended to go with the revised piece on the ancient Ambrosian rite liturgy.
This particular photograph has some interesting points to it. It is a Pontifical Archiepiscopal Mass celebrated at the conciliar altar and in the Pope's presence during the Second Vatican Council.
The celebrant of the liturgy was Archbishop Montini (then Archbishop of Milan, later Pope Paul VI).
From a ritual/rubrical perspective, one can see the element that Nicola de Grandi spoke of with the deacons taking up positions surrounding the altar, rather than their formation as at a classical Roman liturgy.
