Marie Bissell Constantin—an American still photographer—became internationally known for her photographic works of the late Mother Teresa of Calcutta when the Vatican chose one of her photos to hang in St. Peter's Square for Mother Teresa's 2003 Beatification Ceremony. The photo was unveiled in front of over 300,000 people.  During the celebrations Charles Osgood, with CBS Sunday Morning, featured Constantin in a 6-minute piece that showed more than 25 black-and-white photos Constantin made over a 13-year period. 

A native of Hartford, Connecticut, Marie Attended Louisiana State University in Baton Rouge, Louisiana graduating with degrees in General Studies and Journalism.  While Constantin's commercial work took her to industrial plants, hospitals, and a host of hometown businesses in Baton Rouge, earlier in her career her personal work took her to some of the world's worst slums—Calcutta, Haiti, Nicaragua, and Tijuana—where she photographed or worked alongside of Catholic nuns working with the poor.

Most recently Constantin was honored in Baton Rouge as a 2023 Capital Region 500 Most Powerful and Influential Business & Community Leader for her citizen activist work advocating for less flooding and less litter through stormwater management utilities.  Constantin is a co-founder of the Louisiana Stormwater Coalition.  Before her environmental work she became an LSU Manship Hall of Fame Inductee, was honored as an Influential Woman in Business, and was awarded the Pete Goldsby Lifetime Achievement Award.