The four structural components of these windows are all visible in this exterior close-up:
1. painted and fired flat glass for the face and body (lower right corner);
2. jewel-like chunks of dalle de verre extending 2 cm from the surface;
3. lead cames holding both types of glass in place;
and 4. an iron bar, used to support the twelve heavy panels which make up the window.
Most building owners install a layer of tempered glass or Plexiglas over their windows to protect them from the elements and from accidents or vandalism.
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