Roberto Stell was born on 16 March 1953 in Opatija, Croatia. Ethnically, he is Italian. After finishing Technical School (Construction) in Rijeka, he entered university to study architecture in Ljubljana, completing his studies in 1981. In 1976, he enrolled in the Department of Sculpture at the Academy of Fine Arts in Ljubljana. He participated in the sculpture summer school in Marušiči, Istria, and in Forma viva in Seča near Portorož. He works in the field of architecture, design and sculpture.