The sculptural works of the US artist Grant Mooney approach material not as an autonomous property of a substance, but as the effect of a configuration in which material, bodily, and discursive forces intersect and generate one another. Matter is not passively shaped; it acts as a formative force in its own right, generating meaning. In this sense, it becomes an active participant in processes of aesthetic knowledge and experience.
The exhibition sum is Grant Mooney’s first museum exhibition in Europe and, at the same time, a solo presentation that expands into a broader project including works by other artists. With his relational concept of sculpture, Mooney creates a field of currents and flows between objects from the collection of Museum Abteiberg, selected historical works, and works by other contemporary artists. Through this cross-generational constellation, sum examines how materials have behaved since the 1960s and reflects on the development of sculptural practice today.
The exhibition foregrounds processes of transformation and reveals layered connections between materials as they shift from substance to form. The resulting constellation invites a reconsideration of key categories of minimalist sculpture and Conceptual art—such as weight, density, and mass—not as fixed properties but as states shaped by immaterial forces, including biochemical processes and atmospheric change.
Interested in fat as a material that acts not as a socially coded or stigmatized substance but as a physical agent involved in processes of energy storage, heat retention, and physiological repair, the exhibition echoes the remnants of Joseph Beuys’s sculpture Unschlitt/Tallow (1977) at Museum Abteiberg, which was on display there from 1982 to 1996, as well as his Fettecken (Fat Corners) and Fettwinkel (Fat Angles). Fat and its mixtures generate and store warmth within the body and, in Beuys’s work, soften crystalline spatial boundaries and initiate processes of change. As a silversmith and metalworker, Mooney likewise engages the interplay between cold and heat and the transformative potential that lies between them. In this respect, Mooney’s work resonates with Beuys’s concept of warmth—a dialectical principle linking body and mind, the sensory and the supersensory, life and movement, thought and transformation, and thus the plastic energy of sculpture.
sum brings together a range of sculptural practices, including melting, casting, welding, soldering, and cutting (as well as cutting apart), alongside other sculptural processes. These engage forces that shape our physical world yet often remain invisible—such as energy, gravity, and magnetism. In the exhibition, such forces function almost as materials, helping to determine form, meaning, and the arrangement of works. In this way, an expanded understanding of material becomes a curatorial principle.
A similar dynamic appears in Mooney’s installation sphere music—a body of work produced in collaboration with Chisenhale Gallery in London that brings air and its movement into focus as a sculptural substance. Its central element is a harp designed by the artist and installed on the roof of Museum Abteiberg, set into vibration not by touch but by the elemental force of the air. Like this instrument, the other works relinquish agency in different ways, opening themselves to dissolution and transformation. The in-between, the ephemeral, and the immeasurable become points of reference. Materials and forms, intention and chance, participate equally in the processes of formation within the exhibition, articulating new movements of meaning.
The exhibition sum was developed jointly by Alke Heykes and Grant Mooney.
EXHIBITION PROGRAM
Sunday, April 19, 2026, 2 pm
SOUND PERFORMANCE by DYLAN KERR
Dylan Kerr presents Substratum, a composition for voice and fixed electronics that draws inspiration from the Hindustani Dhrupad tradition.
Thursday, 21 May, 6 pm
Curator’s tour with Alke Heykes (in German)
The exhibition is generously supported by the Kunststiftung NRW and the Hans Fries Foundation.
sum includes a new body of work by Grant Mooney that was commissioned and produced by Chisenhale Gallery, London in partnership with Museum Abteiberg. The commission was on display at Chisenhale Gallery from September 26 to December 7, 2025, as part of the exhibition sphere music
Museum Abteiberg would like to thank Miguel Abreu Gallery, New York, for its support.
Fig.: Grant Mooney, sum, installation view, Museum Abteiberg, Mönchengladbach, 2026. Courtesy of the artist and Museum Abteiberg. Photo: Studio Kukulies