What is Quintillian's only extant work?

Quintilian's only extant work is "Institutio Oratoria," which is a comprehensive treatise on rhetoric and the art of education in oratory. This text is significant because it provides insights into Quintilian's views on the education of orators, addressing topics such as the qualities of a good speaker, the processes of learning, and the moral responsibilities of an orator. It consists of twelve books, where he systematically outlines his pedagogical methods and theories.

The importance of "Institutio Oratoria" lies in its balanced approach to rhetoric, blending theoretical discussions with practical instructions. Quintilian emphasizes the necessity of good character and moral integrity in effective rhetoric, which is a key aspect of his pedagogical philosophy. The work serves not only as a manual for aspiring orators but also as a historical document reflecting the educational practices and rhetorical standards of Rome.

The other options, while related to the field of rhetoric, do not pertain to Quintilian specifically. "De Rhetorica" is a significant work attributed to Aristotle, and "Ad Herennium" is often considered the earliest Roman treatise on rhetoric, its authorship still debated. "Orator" is a work associated with Cicero, focusing on similar themes of elo