The Large Oak Tree, Forest of Fontainebleau

The Large Oak Tree, Forest of Fontainebleau, painted in 1839 and now in the Saint Louis Art Museum, is among the most ambitious of Rousseau's early treatments of the Fontainebleau forest — the ancient woodland south of Paris that became the primary subject of the Barbizon school. By 1839 Rousseau had been working in Fontainebleau for nearly a decade and had developed an intimate knowledge of its specific trees, clearings, and atmospheric conditions. The choice of a large oak as the primary subject was not arbitrary: oaks were the dominant trees of the ancient Fontainebleau forest, their massive, irregular forms symbolising French nature's vitality and antiquity. Rousseau gave individual trees a portrait-like attention — identifying specific specimens, returning to them across seasons, treating each as a unique organism rather than a generic type. The 1839 painting predates his most productive decade and shows his early commitment to a monumental treatment of natural form that was profoundly counter to the classical landscape tradition, which typically made trees subordinate to historical or mythological narrative.

Rousseau built the great oak through careful accumulation of marks that differentiate the tree's complex surface — the furrowed bark of the lower trunk, the spreading mass of the canopy, the individual branches catching or blocking light. The surrounding forest is handled more broadly, using the oak's specificity to create a figure-ground relationship within the landscape.