Otto Rapp was born in 1944 in Felixdorf, Lower Austria, and educated in Vienna, where he later worked as a clerk in the Transport and Insurance Business. After completing service in the Austrian Air Force, Otto traveled throughout Europe, eventually settling in Stockholm, Sweden. As a Painter, Otto was initially self taught, studying in the various Galleries and Museums. In Vienna, could often be found at the Akademie der Bildenden Kuenste, admiring the work of the Wiener Schule des Phantastischen Realismus represented there by the Professors Rudolf Hausner and Arik Brauer. Other members were Ernst Fuchs, Wolfgang Hutter and Anton Lehmden. While in Stockholm, Otto was encouraged by an art dealer in Gamla Stan to pursue his art, and he began to paint more seriously. He sold his first painting while busking on the streets of Gamla Stan with a Dutch artist. Traveling around in 1968, Otto wound up in Western Canada and settled in Lethbridge, Alberta. It was in Canada where the majority of Rapp's mature work was produced (under the sponsorship of a small Lethbridge Gallery). Working for the Canadian Pacific Railway, Rapp quit in 1977 to attend the Bachelor of Fine Arts Program at the University of Lethbridge, graduating (with great distinction) in 1982. In Canada, Otto participated in many exhibitions, and held several Solo Shows, culminating in the pivotal 1994 showing at The Prairie Art Gallery in Grande Prairie, Alberta, which earned him the moniker "The Mystic" . Throughout his years in Canada, Otto had been the subject of many reviews and newspaper articles as well as local television shows in Calgary and Lethbridge while being active as an Artist, Art Instructor, Curator, Studio Technician, Art Critic and Juror. In early summer of 2011, Otto returned to live in Vienna, Austria and began working in a studio at the Palais Palffy, which also houses the Phantasten Museum Wien as well as the Vienna Academy of Visionary Art. Since January 2015, Otto has worked in his new studio in Vienna at the KunstQuartierWien, Aichholzgasse 32-34 in Wien-Meidling.