Robert Kradolfer was a pianist. His first teacher was probably his mother who was a professional musician. Later he studied the piano in Zurich and in Warzaw (Poland). After his studies, he lived in Paris and earned his living as a pianist. By the end of the 1920s in Paris, as a consequence of a food poisoning, his left hand was paralysed, and so he began to paint.
He studied at an art school in Florence, Italy, and returned to Switzerland In the beginning of the 1930s, living and working in Uerikon at the border of Lake of Zurich.
By the end of the 1930s, he became sick and went to Davos to a sanatorium (Thomas Mann: Der Zauberberg), so very probably his sickness was tuberculosis, of which he fina