Franz Gregor Hiltner studied from 1970 to 1978 at the Academy of Fine Arts Munich with Karl Fred Dahmen and at the Academy of Fine Arts Nuremberg as a master student with Ernst Weil.
During his studies, he earned his reputation and stage name Gregor Hiltner as a counter in the Nuremberg artist pub Gregor Samsa.
Study trips led him, for example, to a fourteen-month stay in the Middle East (Syria, Jordan, Israel) in 1975-1976, Polynesia and Micronesia in 1979 for six months, in 1980/81 with a scholarship from the German Academic Exchange Service (DAAD) to London, in 1983 to Brazil, but also to Tuscany, Canada and the USA.
In addition to large-format works of abstractism and over a hundred worldwide exhibitions, large works of art such as the design of the Rathenauplatz subway station in 1990[3] and the longest image in Germany (220 × 2 meters) in 1996 were created in the Euromed Clinic, Fürth, with 400 m2 of walkable area.