Constructive Cubism – Synthesis of Structure and Intuition

An art-theoretical consideration by Prof. Dr. Michael Kastor (Emeritus Professor, painter, musician)

When we consider Cubism , we encounter arguably the most radical turning point in modern art history. It was a new beginning when pioneers Pablo Picasso and Georges Braque broke with the centuries-long tradition of mimetic representation of nature, which had culminated in 19th-century Naturalism and Impressionism

The foundation of this development was the theoretical groundwork laid by Paul Cézanne, who, in a letter to Émile Bernard dated April 15, 1904, recommended: “Treat nature according to the cylinder, the sphere, the cone, and place the whole in the correct perspective, that is, so that every side of an object, of a surface, leads to a central point” (Cézanne, Letters, 1988, p. 299). Interestingly, Cézanne did not strictly adhere to this geometric formula in his own works. For him, geometry remained an invisible, stabilizing framework, subordinate to his intuitive perception of color; he continued to paint organically and sought a “harmony parallel to nature.”

It was Picasso and Braque who radicalized this idea years later. Inspired by the groundbreaking Cézanne retrospective in Paris in 1907, they took his geometric postulate literally and systematically dissected the visible world into its volumetric components.

This reduction to surfaces and forms deprived the subject of the image of its purely representational function. It was no longer about the exact reproduction of portraits, landscapes, or still lifes; rather, Cubism opened up the discovery of expressiveness in two- and three-dimensional form, thus definitively shattering classical central perspective.

In the first decade of the 20th century, formal alienation took center stage, with the superimposition of views and the simultaneous presentation of perspectives. What began with Picasso and Braque as a decomposition into distinct forms developed consistently: with the transition to Analytical Cubism from around 1910, further pioneers of modernism almost completely dissolved the boundaries between object and space. This process was driven forward by the intellectual rigor of Juan Gris, the color-based decomposition of light by Robert Delaunay, and the machine-like, dynamic formal language of Fernand Léger. Tangible geometry culminated in an ambiguous structure of lines and spatial layers that challenges the viewer to reconstruct space.

This phase eventually developed into Synthetic Cubism, which, through the integration of real materials, ushered in a return to the tangible object. Braque laid the foundation with "papier collé," by gluing wallpaper or newspaper clippings directly onto the painting surface. In its further development, artists like Braque and Gris increasingly used sand or wood particles, while Lyonel Feininger and Franz Marc sought a more intellectual exploration of form.

The structural logic of Cubism still forms the foundation for understanding abstract pictorial compositions. And anyone who has recognized this creative power of Cubism sees the geometric structures of our modern world with completely new eyes.

Inspiration and vision: The Wilhelm-Hack-Museum

My central inspiration for exploring Cubism, Suprematism, and their constructive and chromatic effects is the Wilhelm-Hack-Museum in the industrial city of Ludwigshafen am Rhein. In particular, encountering the works of Kazimir Malevich and other representatives of the Russian avant-garde has shaped my understanding of the power of pure, non-representational form.

Another personal highlight was the 2009 anniversary exhibition entitled "Everything," in which the museum presented its entire collection—including works from its archives. The walls were covered from floor to ceiling with artworks; an overwhelming cosmos of colors, forms, and emotions that, as a painter, I could never tire of. This dense atmosphere of impressions and expressions continues to influence my work and my understanding of art to this day.

Definition: Constructive Cubism

Through intensive engagement with these historical movements and my own artistic practice, I have defined the term Constructive Cubism . It is not intended as a universally valid art historical category, but rather as my personal conceptual approach. This approach forms a methodological bridge that connects the Cubist deconstruction of the world with a Constructivist reorganization of pictorial space. While classical Cubism usually starts with a real object in order to deconstruct it, my method addresses the primary geometric form directly.

I begin my work either with a central object at the center of the image or with a basic form, such as a square as in "CUBISM I". Starting from this core, I develop spatial perspectives that are sometimes purely intuitively inspired, sometimes rigorously mathematically constructed. The focus is not on the exact spatial composition, but rather on the creation of an autonomous pictorial reality.

My paintings are characterized above all by their multi-perspective approach. I do not aim for a precise spatial composition; rather, I want the viewer to discover their own perspectives and open themselves to the freedom of their own inner vision. New perspectives can often be gained by rotating the painting, which constantly reveals new views and vanishing points. In this, I consciously draw on the spatial-dissolving tradition of Analytical Cubism , which viewed the subject from multiple angles simultaneously, but I translate this into a free, subjective perception.

On the other hand, the image can be an intuitive composition: surfaces and forms come together from the momentary aesthetic sensibility; form and color result from inspiration, with the constructive basic order always forming the foundation. In "MERRY CUBISTIC CHRISTMAS," I create this order through a network of diagonal lines that translate the Christmas tree into an architectural structure. The green tones range from deep emerald to light nuances, which is intended to give the composition spatial depth.

This structure is crowned by a luminous yellow star, serving as its geometric center of light. In the lower third of the image, massive, cubic blocks in vibrant colors anchor the work, forming a substantial foundation. The contrast between these solid forms and the fan-shaped segments of the background makes the central figure appear almost sculptural.

The psychology of color and surface

As Goethe aptly remarked: “Colors are deeds of light, deeds and sufferings.” (Goethe, 2003, Preface). This view significantly shapes my understanding of my artworks: for me, color is the living link that connects the mathematical rigor of construction with the subjective level of perception.

Drawing on Goethe's theory of colors and its description of the "sensual-moral effect" of color, she transforms geometric order into a deeper emotional experience. This is particularly noticeable in the context of my Christmas painting: Here, the colors are not mere decoration, but rather activate individual chains of association and biographical memories. I design the surfaces with classic tones such as red, blue, yellow, and green, and combine them with shimmering colors (gold, silver, bronze, copper) as well as tactile, matte, or rough textures.

Looking at this work, the purely constructive structure dissolves and makes room for the luminous experience of one's own childhood – the warm feeling of the colorful tree and the anticipation of the gifts immediately come alive.

For me, the color psychology of Heinrich Frieling also plays a crucial role: Frieling understood color as a biological factor that directly affects the autonomic nervous system via the eye, thus activating unconscious, collective, and personal knowledge stores. The chromatic design creates a resonance that balances the rational coordinate system and makes the spiritual dimension of space perceptible not only as a construction, but also as an emotional homecoming.

Frieling underscores this power with the insight that color is a "mirror image of man" and his psychological structure (Frieling, 1983, p. 12). This statement by Frieling forms the core of his theory: colors function as immediate, psychosomatic signals. They bypass the filtering intellect and allow me, too, to connect the geometric rigor of the construction with the emotional experience of the viewer.

In "FUTURFLOWERS I," the theory of Constructive Cubism already foreshadowed. While the architecture of the chronologically later "Merry Cubistic Christmas" painting is based on the strict decomposition of form, the dynamism of the "future flowers" breaks down the strict geometric statics. Here, however, the flower is not conceived as a purely botanical representation, but as a geometric, biologically analogous structure of colored elements.

Frieling's color dynamics are evident in the choice of colors in their purest form: the interplay of vibrant hues and metallic accents creates a visual vibration that simulates the growth and vitality of nature. The "Futurflowers" thus represent the symbiosis of technical construction and natural development – ​​they are a vision of nature that has found its new, timeless order in the clarity of geometry.

The consistent further development of this creative freedom finally culminates in the fourth work of this series, which combines the previously developed principles of form dissolution and reconstruction in a large-format vision.

In “CUBISTIC WORLD”, I make the architecture of the surface visible and tangible in its purest form. The work is dominated by a central triangular structure that, like a prismatic center, stabilizes the entire pictorial space. Broad, white bridges cut through the composition like a skeletal framework, taming the luminous color fields.

This geometric rigor creates a sense of depth. The work directly connects to the structural clarity of Analytical Cubism, but liberates it from its historically reduced, muted palette: through the deliberate use of large, luminous areas of color, its dogmatic strictness is broken up and transformed into a vibrant, modern formal language. Particularly in the lower third of the central segment, stylized, vertical rectangles appear, resembling a distant skyline or modern monuments and lending the image an urban dimension.

The deliberate texturing of individual surfaces of the curved lines in the "sky" creates tactile accents that form an exciting contrast to the smooth color fields, softening the mathematical rigor and bringing an organic touch to this constructed world. This brings my theoretical considerations full circle: CUBISTIC WORLD is not a testament to the world's decay, but rather the sovereign, constructive creation of a new, ordered reality. It is my personal reconciliation of reason and emotion.

Constructive Cubism is far more than a formal set of rules; it is the endeavor to unite geometric rationality with the untamed immediacy of human emotion. Within this tension, the canvas becomes a resonating chamber where mathematical precision and the psychological effects of color interpenetrate. Ultimately, this approach is the architecture of my soul—a way to utilize the historical depth of the avant-garde to create a new, multi-perspective reality in the here and now.

Literature (excerpt)

• Cézanne, Paul: Letters, edited by John Rewald, Diogenes, Zurich 1988.
• Düchting, Hajo: Cubism, Bags, Cologne 2000.
• Frieling, Heinrich: Living more consciously with colors, Musterschmidt, Göttingen 1983.
• Gage, John: Cultural History of Colour: From Antiquity to the Present, Ravensburger, Ravensburg 1999.
• Goethe, Johann Wolfgang von: On the Theory of Colours, dtv Verlagsgesellschaft, Munich 2003.
• Malevich, Kazimir: The Non-Objective World, New Bauhaus Books, Mainz / Berlin 1980.
• Spieler, Reinhard (ed.): Everything – 9236 works, Wilhelm-Hack-Museum, Ludwigshafen 2009.
• Wilhelm-Hack-Museum (ed.): 20th Century Art – A Selection from the Collection, Ludwigshafen 1999.

About the author and artist

Prof. Dr. Michael Kastor is aretired university professor, painter, and musician.

Where mathematical rigor meets the resonance of the soul, a new dimension of abstraction emerges. In the works of Prof. Dr. Michael Kastor, geometric order awakens to a vibrant cosmos through the emotional power of color. The text invites us to look beyond the rational framework of the construction and to immerse ourselves in the color-psychological spaces of our own memories.

Four exemplary acrylic paintings of Constructive Cubism, created by the author himself, illustrate these art-theoretical considerations.

Michael Kastor

Professor Dr. Michael Kastor, born in 1958, understands art as the "architecture of the soul." The emeritus professor and passionate painter and musician uses geometry as an organizing framework to make the psychological power of color tangible. In his texts and paintings, he reflects on the historical depth of Cubism and transforms it into a timeless, non-representational visual language.