Church of Saint Lou d'Esserant in the Oise 

This sketch, "Church of Saint Lou d'Esserant in the Oise," by Theodore Rousseau, depicts the imposing silhouette of a church against a soft, purple sky. Rousseau, a key figure in the Barbizon school, favored depicting landscapes in a realistic, almost photographic manner. His use of loose brushstrokes and suggestive outlines gives the painting a sense of immediacy and atmosphere, capturing the essence of the church's architectural grandeur.