Stained glass windows in churches are designed to be seen from inside the building. The best conditions for viewing them is when the sky is coverd in white cloud - sunlight causes the colours to vary too much in intensity. However, when sunlight does flow through stained glass windows it often leads to interior stonework and furnishings being bathed in the colours of the glass.
On a recent visit to Gloucester Cathedral the new, modern seating and the floor tiles in the nave picked up the colours in a very striking way and the dark, seventeenth woodwork of the organ case was bathed in dappled red and blue light.
