The New York Times has an article about the recently-finished restoration of Chartres Cathedral. For the first time in a decade -- no scaffolding inside!
The Cathedral has been restored to the way it would have looked in the 13th century and is quite white, bright and light. Some stained glass windows have not been cleaned (yet?) and show the contrast. In 2019, the restoration of transepts will begin, and scaffolding will once again show up inside.