'Coloured stained', may indicate tinted, painted or enamelled glasses, or tinted glass with real 'stained' glass. It can be found on windows, doors, ceilings, lunettes, light bulbs, chandeliers and other glass elements of historical buildings. Because of its nature, a stained glass window is a unique and irreplaceable artistic creation and must be treated with respect. The concept of conservation and renovation requires that every effort taken to preserve as many original elements as possible. Moreover it should be taken into account that alterations to the original work are minimal. The aim of restructuring is to restore the object to its original appearance and preserve its longevity. The video shows a craftsman during the renovation of the old skylight at Maison Losseau in Belgium.