In Rome, 400-year-old fresco paintings in one of the most popular shrines in Christendom - obscured by thick grime and soot - have been restored to their original glory.
The BBC's Rome correspondent David Willey was given a tour of the building that is home to the Scala Santa or Holy Stairs. He spoke to Mary Angela Schroth, who is coordinating the 10-year restoration project.
Not all images have captions. Photographs courtesy Passionist Fathers of the Holy Stairs and David Willey. Music courtesy KPM Music.
Slideshow production by David Willey and Paul Kerley. Publication date 3 December 2009.
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