"Construcción (boceto para el mural de Saint Bois)" is a preparatory sketch by Joaquín Torres-García executed in oil on cardboard for a larger mural project at Saint Bois. The work exemplifies Torres-García's distinctive constructivist approach, featuring geometric forms and structural elements arranged in a composition that balances abstraction with underlying architectural principles. As a boceto, this piece demonstrates the artist's process of translating his modernist vision into monumental public art during his influential period in Uruguay.