It is worth noting the presence of a real historical figure, father Charles Michel de l'Épée. The abbot de l'Épée was one of the first to take an interest in the issue of public education for the deaf, giving priority to sign language as a language of instruction.

Mathilde is a character typical of the Enlightenment era, devoted to science, embarked on the creation of a simple diving suit, called "hydrostathetic machine". This detail is historically correct, the real model being the diving suit by Freminet (1774).

Opening film at the 1996 Cannes Film Festival.

Randall Wallace hired Judith Godrèche in The Man in the Iron Mask (1998) because he was a fan of her work in this movie.