Phoebammon was a Greek teacher and performer of rhetoric, known as a sophist, who lived during the Roman Imperial period, likely in the 2nd or 3rd century CE. He was part of the Second Sophistic, a cultural movement focused on reviving classical Greek language and eloquence. His Egyptian name suggests he may have come from that region, but the details of his life are otherwise unknown.

He is remembered for a single surviving work, a technical handbook titled On Figures. This treatise is a systematic guide to various figures of speech, written as a textbook for students of rhetoric. Unlike the famous public speeches of other sophists, Phoebammon’s work represents the scholarly, instructional side of the movement.

His historical importance lies in this contribution to rhetorical education. According to modern scholars, his manual helped standardize and transmit the formal study of eloquence. Its preservation indicates it was used as a reference work for centuries, providing a direct link between the rhetorical traditions of the Roman Empire and later Byzantine learning.