Ο Francis Anthony Mesmer (Franz Friedrich Anton Mesmer, 1734-1815) was a German physician known for developing the theory and method of “magnetism” or “mesmerism”, a practice that would later evolve into modern hypnosis. He studied medicine in Vienna and became famous for his pioneering methods, which, despite the contradictions that accompanied them, influenced the medical thinking of his time.

Mesmer’s influence on modern medicine is controversial, but his contribution to the development of hypnosis is considered significant.

Mesmer also had spiritual and philosophical leanings and was a member of Freemasonry, actively participating in activities that promoted the principles of the Brotherhood. He became involved in Philadelphia Lodge in Narbonne, France, and came into contact with many thinkers and philosophers, including Freemasons.

He laid the foundations for the exploration of the human soul and the subconscious, while his participation in Freemasonry reflects his philosophical quest and the connection between science and the mystical currents of the time.

It is widely accepted that his participation in the Lodge was part of his social circle and intellectual interaction during his time.

Mesmer died on 5 March 1815 in Meersberg, Swabia.