Robert Treat Paine (October 28, 1835 – August 11, 1910) was an American Boston-based lawyer, philanthropist, and social reformer. He is most widely known for his work as chairman of the building committee of Boston's Trinity Church in Copley Square, for his leadership of 19th century Boston philanthropists, for his summer home in Waltham, Massachusetts, and for his experiments in building housing for low- and middle-income workers. Source: Wikipedia (en)