This part of the window is dominated by the image of Christ's crucifixion.  Jesus is surrounded by four angels.  There are two larger angels.  The one to the left has the sun under the angel's feet.  The one to the right has the moon under the angel's feet.  Behind them there is rainbow.  The two smaller angels are at the feet of Jesus.  The left one holds a communion cup; the right one a small loaf of bread with a cross on it.  The angel with the bread points down towards a pelican - a bird associated with sacrifice, particularly the sacrifice of Jesus on the cross.