El conde de Galve


Source: Margo Glanz, Sor Juana Inés de la Cruz; saberes y placeres. Toluca, México: Instituto Mexiquense de Cultura, 1996, p. 40.
Portrait: "Gaspar de la Cerda Sandoval Silva y Mendoza, conde de Galve," Anonymous. Oil on canvas, 17th century.
Question: What is this painting communicating? Why is it a baroque painting?