Battle of Treviño by Francisco Oller is a historical painting capturing a moment from the Spanish Civil War of 1874. As one of Puerto Rico’s most renowned painters, Oller combines European academic traditions with a keen sense of local and historical identity. The composition is filled with the energy of battle, with soldiers engaged in fierce combat. Oller’s use of color and movement gives the painting a sense of immediacy and drama, while also reflecting the artist's ability to depict the intensity of war and its effects on the human spirit.