Discovered several years ago by a local glass maker, a stained glass window found hidden in the dark cellars under Bath Abbey has left experts in awe.
It was found entirely by chance - local glass maker Annette Martin noticed it leaning against a wall. The filthy item was mistaken for being an ordinary, colourless window, and Martin was astonished when rubbing the glass revealed colour.
The window does not depict the religious themes which are present in the overwhelming majority of stained glass windows, but instead is a unique example of the Victorian Arts and Crafts movement.
The movement, started by William Morris and drawing on the ideas of John Ruskin was a powerful force in art and architecture in the English-speaking world in the late 19th and early 20th century. It emphasised simplicity of form and truth to materials amongst other principles.
The window depicts, amongst other images, four artist/craftsmen: a sculptor, a painter, a copper-plater and a wood-carver. The piece will be assessed on the BBC's Antiques Roadshow this Sunday.