1928: First one-man show and public recognition at Zug, Switzerland
1931: One-man show at the St. Gallen Museum, Switzerland
1931: One-man show in Munich
1932: Participated in the Swiss National Art Exhibition
1933: Admitted to membership in the Künstlervereinigung Zürich founded by Ferdinand Hodler, and exhibited several times between 1933 and 1946 under the sponsorship of this society at the Kunsthaus, Zurich.
1933: Exhibited in Ascona, Milan and Barcelona
1934: Founder and director of "Künstlerhaus", Hirschengraben, Zurich
1934: Brussels/World Exhibition, one-man show
1934: Exhibitions in Zurich, Berne, Lucerne, St. Gallen and Solothurne
1937: Invited to join the "Surindependents", exhibited with them for the first time. Picasso is much impressed, and Charlie Chaplin bought one of his paintings there. The exhibition travels to over 20 French cities, and Hansegger's name is established in the French art world.
1938: Paris, exhibited with Surindependents
1938: Rome Art Club, one-man show
1939: Won Silver Medal of Paris at Colmar exhibitions
1939: Exhibited with Surindependents in Paris and Belgium
1940: Exhibited in Paris with Surindependents
1941: Exhibited in Paris with Surindependents
1942: Exhibited at Arkaden-Galerie, Davos
1942: Active member between 1942 - 1947 of the "Allianz", Confederation of Mordern Swiss Artists in Zurich.
1947: First American visit while enroute to Japan and Ecuador
1947: Exhibited in New York at the American arm of the famous Galerie Nierendorf along with Klee and Kandinsky
1948: One-man show in Tokyo, organized by Japanese artists. 23 of 24 paintings sold
1949: Exhibition at the Kunsthaus, Zurich
1951: One-man show at Durban Art Gallery, Durban, South Africa
1952: One-man show at Gainsborough Gallery, Johannesburg, South Africa
1953: One-man show Princeton Art Museum, Princeton, New Jersey
1954: One-man show at Gallery Moderne, New York
1955: Exhibited in three-man show at Lotte Jacobi Gallery, New York
1956: One-man show, Gallery 75, New York
1957: Artist's Gallery, New York
1957: National Arts Club (International Exhibition), New York
1957: Berkshire Museum, Pittsfield, Massachusetts
1958: Nechemia Glezer Gallery. One-man show in honor of Hansegger's 30th year of exhibitions.
1959: Columbia County Centennial Exhibition, Hillsdale, NY
1960: Museum of Modern Art, Paris, France
1960: One-man show, Columbia University, New York City
1960: Exhibition, Albany Museum, New York
1960: George Mayer Gallery, Cleveland. One-man show.
1962: Pittsfield Art Museum, Massachusetts
1962: Sharon Art Show, Sharon, Connecticut
1963: One-man show, Key Galleries, New York
1969: O'Keefe Art Center, Toronto, Canada
1970: One-man show, Spencer Gallery, Manhatten Art & Antiques Center
1971: One-man show, Columbia Memorial Hospital Exhibition, Hillsdale, NY
1972: One-man show at Shaker Museum Festival, Old Chatham, NY
1976: One-man show at Swiss Center, New York
1980: One-man show at Columbia-Greene Community College. This was the dedication of the opening of the John Konstantin Museum at the college
1981: Art in Pestalozzihaus, Zurich. Important international exhibition of Hansegger's Rectilinear Shapes series.
1988: One-man show at the Kunstmuseum St. Gallen. Curator Rudolf Hanhart chose to exhibit Hansegger's Abstract Parallels series as a tribute to Hansegger's 80th birthday. Several of the paintings are now in the Kunstmuseum's collection.
(Source: "Presenting Hansegger", by Absolute Auctions Publishing &
Martica Sawin: Hansegger: Paintings 1949-1960, a Golden Griffin book, Arts, Inc. New York)