The twins Joël and Jan Martel were sculptors best known for their four concrete Cubist "trees" designed for a garden setting at the 1925 Exposition des Arts Décoratifs et Industriels Modernes in Paris. Although the exhibition was intended to feature the best examples of contemporary decorative arts and design, most of the works shown were stylistically rooted in tradition. The few uncompromisingly modernist displays, including the Martel trees, were derided in the popular press: one cartoon depicted a baffled gardener debating whether to water them. More than fifteen feet high, the trees were destroyed when the exhibition closed; this maquette is the only nonphotographic record. Each had a cruciform trunk supporting quadrangular planes attached vertically and at angles, suggesting foliage; their abstract modern sensibility clearly derived from the polemics of Cubism.