The cartoons for the eight exterior spandrels, four triangular gables, and the interior of the dome were painted by J.R. Clayton, which Salviati decorated with 1,200 sq ft of Venetian mosaic.
South facade - Poetry
East facade - Painting
North facade - Architecture
West facade - Sculpture
Barr, Sheldon. Venetian Glass Mosaics: 1860-1917. London: Antique Collectors' Club, 2008. 18-20.
Wikimedia Commons Photo by DAVID ILIFF. License: CC-BY-SA 3.0
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