Valencia, Spain— Five little-known works by Juan Luna remain in the Casa-Museu José Benlliure, far from the Philippine collections that usually define his career. Four are catalogued under his name, while a fifth watercolor carries a tentative attribution: Sacerdotisa (1883), Retrato de María Benlliure Ortiz niña con abrigo azul (1884), Poblado filipino (c. 1880), Paisaje…