Born in Egypt in 1948, Tatossian immigrated with is family to Montreal in 1960 where he studied under Serbian sculptor, José Majzner, Adam Sheriff Scott from 1966 to 1969. He studied art history at McGill University from 1967 to 1969 followed by training as a muralist in Italy in 1970. He also studied with Jean Carzou in Paris in 1971 and painted with Jean Paul Riopelle in 1975.
He exhibited in North America, Europe and Asia, and his work can be found in the collections of the Montreal Museum of Fine Arts, the National Gallery of Canada and the Musée national des beaux-arts du Québec, among others. Tatossian died in Montreal in 2012.
The region was named after Pierre François-Xavier de Charlevoix, a French Jesuit explorer and historian who travelled through the area in the 18th century. The community of La Malbaie was known as the first resort area in Canada. For much of its history, Charlevoix was home to a thriving summer colony of wealthy Americans, including President William Howard Taft.