Robert Walter Stewart (1812–1887) was a Scottish minister of the Free Church of Scotland and who spent much time working in Italy and served as Moderator of the General Assembly 1874/75. He helped to promote the Waldensian Church and the Presbyterian movement in northern Italy. He was also a travel writer and early photographer. Being independently wealthy he frequently detached himself from his religious duties for extended holidays. However, he was a noted philanthropist and put both time and money into the promotion of the Presbyterian Church in Italy.