The top of the window:  In the middle of this picture a dove descends towards the crucified Christ.  The "INRI" lettering (the Latin initials of Jesus of Nazareth King of the Jews) can be seen at the top of the cross.  Behind that is a flow of water.  On either side of the dove are two crouched angels.  The one on the left has a golden crown; the one on the right has a crown of thorns.