Hartmann continued his activities as a sculptor until the end of the 1990s when he was stricken by Parkinson's disease, which gradually prevented to him from fully working with his hands.
A reviewer of the exhibition said Peter Hartmann, has a prestigious manner in imposing upon his works, his sense of beauty and his impassioned style.
His works denotes a nobility of expression whereby this traditional approach from where a sensuality and simplicity bore, makes Peter Hartmann a significant sculptor.
There is no audacity in the sculptures, but only the perception of the rhythm and a subtle suggestion of the movement that brings his characters resulting from mythology to reality.
- Journal du Jura[This quote needs a citation]Many of Hartmann's works are permanently installed in various public spaces around Geneva.