The Bavarian windows are a series of five windows in the southern side aisle of Cologne Cathedral. They show five scenes from the early Christian period, starting with John in the west and ending in the east with Stephen, the first Christian martyr.
The lead glass windows were a gift from King Ludwig I. of Bavaria. The first ideas and plans for this project date back to 1842.
They were unveiled on the 14th/15th August, 1848 to mark the 600-year anniversary of the laying of the foundation stone.