Born in Rosario, Argentina, Leonardo Antoniadis studied anthropology and started to get into photography in Buenos Aires. His first experiences in press photography took place within local newspapers and the magazine « Paz y Justicia« , run by the Nobel Peace prize winner Adolfo Pérez Esquivel. In 1991, in France, he worked freelance for newspapers and magazines: L’événement du jeudi, l’Humanité, Libération, Le Monde. Studying visual anthropology and training in video making triggered his interest for documentary cinema. From 1966 he started making « reportages » for foreign newspapers: El Mundo, La Nacion, Svenska Dagbladet. On a personal level, he has always had a strong interest in the lives of stigmatised populations. Since the 1980s, he has produced in-depth photo- and video-documentaries about Ocaina, Shipibo, Mataco people, South American slum inhabitants and Romani and travellers populations in Europe.
In parallel with this professional shooting work, he has taught « reportage » photography at the Spéos Photographic Institute in Paris since 2002.