The great basilicas of Rome like Saint Joseph Church in Macon have the celebrant of Mass facing the geographical east which means that the altar faces the nave of the Church and the people who are gathered there so that the Mass is both Ad Orientem and Ad Populum (facing east and facing the people) at the very same time.
At Saint Joseph Church the reform of the Mass after Vatican II allowed the parish to revert to the early tradition of facing the geographical east or ad orientem and at the same time face the people.
In the pre-Vatican II missal, the Mass at Saint Joseph Church was not facing the geographical east but the west and thus Mass had to be celebrated with the priest's back to the people what would be called "ad occidens." Fortunately after Vatican II we were able to recover ad orientem worship at St. Joseph Church in Macon.
Mass at Saint Joseph Church in Macon facing the geographical west (ad occidens) away from God! (Currently this unusual way of facing away from God who will return from the east, only occurs during the EF Mass at St. Joseph)
I am personally grateful that we are able to celebrate Mass at Saint Joseph Church towards the East for the Ordinary Form of the Mass. Maybe one day I will find the courage to celebrate the EF Mass at St. Joseph Church Ad Orientem too! Time will tell!