A brilliant painter of society portraits, John Singer Sargent also devoted many years at the height of his career to a project of an entirely different order: an ambitious, multimedia decoration titled Triumph of Religion (1890-1919) for the Boston Public Library. The library cycle Sargent imagined as his most important work, however, would ultimately remain unfinished, quietly abandoned in the face of religious opposition, one critical painting short of completion. Truncation dramatically altered possible readings of Triumph, redirecting its narrative energies and generating new meanings in tension with the idea Sargent had proposed. In Painting Religion in Public, Sally Promey tells the story of an artist of international stature and the complex and consuming pictorial program he pursued in Boston. Highly celebrated in its day, with individual panels retaining immense popularity even in the years of discord, this artistic project and its constituent images tell us much about broad cultural and political exchanges concerning the public representation of religious content in the United States.