Cologne Cathedral has many impressive features, but its stained glass windows are among the world’s oldest and finest. However, centuries of being exposed to the elements has meant restoration glass was required to restore and protect them for the future. SCHOTT AMIRAN® Heritage Protect provided the answer.
One of the defining features of Cologne’s magnificent gothic cathedral is its stained glass windows, some of which date back to the 13th century. As well as providing spectacular decoration, their illustrations and decorative images serve as religious symbols telling biblical stories. More practically, the windows let light into the huge structure (for a brief period, the tallest in the world) and protect it from the elements. Over many years, however, the clarity of the windows has slowly dimmed due to deposits from water and toxins in the atmosphere – a common problem with medieval glass.