A follower of spiritualism, Frantisek Jaroslav Pecka began creating art in the early 1920s.

His early works were abstract and colorful, sometimes floral. He then created portraits of women and androgynous figures, strongly inspired by Art Nouveau.

A writer, archaeologist, teacher, geologist, paleontologist, and member of the Czech Metapsychic Society, his work was exhibited in Prague, Brno, and Paris during the National Spiritist Congress in 1927.

In June 2021, Pecka's work joined the new Art Brut section of the Centre Pompidou following the donation of the Bruno Decharme collection.

Exhibitions:

- National Museum of Modern Art - Centre Pompidou - Bruno Decharme Donation 2021

- Hayward Gallery "Not Without My Ghosts: The Artist As Medium" - 2020

- LaM "Lesage - Simon - Crépin: Painters, Spiritualists and Healers" - 2019