Francisco Pacheco del Río was a Spanish painter, best known as the teacher and father-in-law of Diego Velázquez and Alonzo Cano, and for his textbook on painting, entitled Art of Painting, that is an important source for the study of 17th-century practice in Spain. He is described by some as the "Vasari of Seville": vocal and didactic about his theories of painting and thoughts about painters, conventional and uninspired in his executions.