Most interestingly are the windows that ended up in the sanctuary. These windows depict the angels and their role in salvation history. As the Mass is said to be the closest thing to "heaven on earth" how appropriate to have here the action of salvation history that took place with heavenly bodies if I may refer to angels as such.
Here is the window directly opposite. At center is the archangel Gabriel who, with horn in hand, announces to Mary, depicted below by the letter "M" and the lily (symbol of her purity) that she has been chosen to be the vessel of the incarnation. To his left is the archangel Raphael accompanies Tobia (Tobit's son) on a long journey (hence the staff) and provides for him a cure for his father's blindness made from a fish (hence the fish).