Pittacus is primarily associated with Pittacus of Mytilene, who lived from approximately 640 to 568 BCE and was counted among the Seven Sages of Greece. No biographical information exists for a later author of this name. This indicates that the Letters of Pittacus are a pseudepigraphical work, composed under the sage's authoritative name during the Hellenistic or Roman Imperial period, likely between the 3rd century BCE and the 3rd century CE.

The sole known work attributed to this name is the pseudepigraphical Letters of Pittacus, a collection written in an epistolary format. The available sources do not detail its specific content or the precise number of individual letters it contained.

The work is a clear example of pseudepigraphy, a common literary practice for engaging with classical authority. Its classification under rhetoric suggests it served as a model for epistolary style or as a rhetorical exercise. Its significance lies in illustrating the later reception of the Seven Sages tradition and the enduring conventions of pseudepigraphical literature in antiquity.