| Artist | Carl Spitzweg |
| Object | painting |
| Technique | oil on cigar box lid |
| Dimension | 21 × 14 cm |
| Title | “Der Rosenkavalier” |
| Date | 19th century |
Before treatment: The varnish layer is matt and darkened. It was replaced with a new varnish. Old inpaintings were removed, filled and retouched.
Before treatment.
After treatment.