Windows are glass to let in light and keep out weather. They often include pictures composed in stained glass. This practice arose at a time when most worshippers were not literate, and the pictures contained in the stained glass windows were intended to convey stories from the Bible or depictions of the majesty of God. Below you can see the Life of Jesus as depicted in the windows found in the church nave. Click the arrows in the upper left corner of the image to enlarge.