a clean “window” showing Frieze of Prophets, detail of the head of the prophet Zephaniah

“Windows”

After performing numerous cleaning tests on small areas, conservators cleaned several larger areas on representative murals. These larger areas, know as “windows,” allowed Boston Public Library officials and the public to imagine how the murals would look after restoration.
A clean “window” showing Frieze of Prophets, detail of the head of the prophet Zephaniah (1999 photo)
The Triumph of Religion