In the google maps picture below, the red circle on the upper right is that of the papal apartments on the terzo piano. The lower left indicates the Holy Office, the Congregation for the Doctrine of the Faith, where he spent a good part of his life. On the lower left, almost off the screen, is where the Lourdes grotto is. On the upper left is the monastery which is his new hermitage. Vatican Radio still has much of their operations in the building immediately to the left of that.