All of Sargent’s murals are to be found in the Boston/Cambridge, Massachusetts area. They are in the Boston Public Library, the Museum of Fine Arts - Boston, and Harvard University’s Widener Library. Sargent’s largest scale works are the mural decorations that grace the Boston Public Library depicting the history of religion and the gods of polytheism. They were attached to the walls of the library by means of marouflage (using an adhesive that hardens as it dries such as plaster or cement). He worked on the cycle for almost 30 years but never completed the final mural. The murals were restored in 2003-04. (http://poulwebb.blogspot.nl/2014/04/john-singer-sargent-part-23.html)