A precise geometric composition by Brazilian-Swiss artist Lothar Charoux, *Quadrado* presents a study in form and spatial tension through the structured interplay of squares rendered in gouache on board, mounted on wood panel. Charoux's signature Concrete art sensibility is evident in the work's rigorous adherence to geometric principles, where line, angle, and plane are carefully orchestrated to create a sense of dynamic equilibrium. The materiality of the gouache lends the composition a rich, matte surface quality that emphasizes the purity and clarity of its abstract form.