The art of window cleaning

Sterling Library contains more than 3,000 decorated windows. The windows of the nave will be cleaned and restored as part of the renovation project.
One of glass artist G. Owen Bonawit's painted enamel windows, which glass experts have described as some of world's finest examples of the craft.
Glass renovation expert Kenneth Lambides prepares a leaded glass window panel for removal.
Each window panel is held in place by wires and sheets of molded lead. Here, Lambides pries open the final strip of lead holding the panel in place.
This particular panel was damaged decades ago when the central glass area was removed to create a vented window. The clumsy handling of the vent design broke a section of the leaded frame, which will now be restored.
Lambides raises the panel and lifts it fee from the limestone grove that has held it in place for 83 years.
Each of the dozens of leaded glass panels in the Sterling Library nave area is an individual work of art. There are no machined parts or prefabricated elements. Each panel frame is the unique work of a particular glass artisan.
Detail of the leaded framework of this window panel, "painted" with molten lead by an artisan following the designs of architect James Gamble Rogers and glass artist G. Owen Bonawit.
Lambides lifts the frame free of the window for crating and shipping to the restorer's workshop in New Jersey.
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Opened in 1930, Yale's Sterling Memorial Library is architect James Gamble Rogers' masterpiece of collegiate gothic style. The central nave of the library's cathedral-like entrance is being renovated and restored, including its stained glass windows.
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