Quintilian was a prominent Roman rhetorician and educator in the 1st century CE who wrote the influential work "Institutio Oratoria". This extensive 12-book treatise covered various aspects of rhetoric, including literary criticism. Quintilian believed rhetoric and literature were closely related and emphasized studying great works to learn style. He advocated literature that inspired virtue and saw criticism as both analytical and ethical in assessing a work's influence on society. "Institutio Oratoria" had significant influence on rhetorical practices and education for centuries.