The catalogue is published to mark the guest exhibition by the Marli Hoppe-Ritter Collection at the Fondazione Marcello Morandini. The exhibition showcases some 40 paintings, pictorial objects and sculptures from the 1960s to the present. They cover a wide range of constructive-concrete approaches and give a keen insight into a major focus of the collection. The exhibits range from paintings by the leading lights of the Zurich Concretists to systematic compositions from the following generations of artists, as well as to geometric paintings and wall reliefs in a wide diversity of materials by contemporary artists from many European countries.

The catalogue was published by the Fondazione Marcello Morandini and, with over 160 illustrations, gives a vivid impression of the exhibition on the art of the Marli Hoppe-Ritter Collection.

With a foreword by Marli Hoppe-Ritter, introduction by Barbara Willert, text by Marcello Morandini, and further contributions

Publisher: Fondazione Marcello Morandini 2023

Once again the third catalogue of the Museum Ritter collection presents an exemplary selection of around 120 works from the Marli Hoppe-Ritter Collection.
The holdings of the collection now encompass over 1000 prints, paintings, sculptures and objects of abstract geometrical art that all revolve around the theme of the square. The spectrum ranges from historical approaches such as Russia Constructivism and the Bauhaus via abstract geometric art from the Zurich Concretists and Op Art, to present day Neo Geo and contemporary Light Art and Kinetics. These works, by and large from Europe, demonstrate the new, fascinating possibilities that are constantly generated when art looks at the square.

With around 120 work descriptions, foreword by Marli Hoppe-Ritter, introduction by Barbara Willert, and an interview with the collector by Martin Stather

Publisher: MUSEUM RITTER, Wunderhorn Verlag 2018

This catalogue is published to mark the large-scale presentation of the collection at Museum Ritter, “Homage to Square” (17.10.2009 – 11.04.2010), and showcases 112 works by means of reproductions and texts. Together with an interview by Kurt Weidemann with the collector, a review of the first four years of Museum Ritter by Gerda Ridler, and a look forwards by Barbara Willert to current abstract geometrical art practice, the publication gives a vivid picture of the collection, the collector and the museum.

With contributions by Marli Hoppe-Ritter, Gerda Ridler, Kurt Weidemann, Barbara Willert, and others

Publisher: MUSEUM RITTER, Wunderhorn Verlag 2009

The opening exhibition at Museum Ritter and the accompanying catalogue with around 100 exhibits provide a representative view of the Marli Hoppe-Ritter Collection. Simultaneously the exhibits trace out in exemplary fashion the history of geometrical art from its beginnings in the 1910s to the present. The chronological point of departure is a small Suprematist pencil sketch by Kasimir Malevich from the year 1915. From there the narrative arc follows the various currents in Concrete Art from the 1920s to the 1950s, the "Zurich Concretists" and "Arte Programmata" in Italy, ZERO and Kinetic art, and right up to present-day approaches with computer art and installations

With contributions by Marli Hoppe-Ritter, Ralf Christofori, Gerda Ridler, and Barbara Willert, among others.

Publisher: MUSEUM RITTER, Wunderhorn Verlag 2006