A Panegyric is a formal public speech delivered in high praise of a person or thing, a generally high studied and undiscriminating eulogy. It is derived from Greek meaning a speech "fit for a general assembly" (panegyris). In Athens such speeches were delivered at national festivals or games, with the object of rousing the citizens to emulate the glorious deeds of their ancestors.

The most famous are the Olympiacus of Gorgias, the Olympiacus of Lysias, and the Panegyricus and Panathenaicus (neither of them, however, actually delivered) of Isocrates. Funeral orations, such as the famous speech put into the mouth of Pericles by Thucydides, also partook of the nature of panegyrics.

The Romans confined the panegyric to the living, and reserved the funeral oration exclusively for the dead. The most celebrated example of a Latin panegyric (pane gyricus) is that delivered by the younger Pliny (AD 100) in the senate on the occasion of his assumption of the consulship, containing a somewhat fulsome eulogy of Trajan.

Towards the end of the 3rd and during the 4th century, as a result of the orientalizing of the Imperial court by Diocletian, it became customary to celebrate as a matter of course the superhuman virtues and achievements of the reigning emperor.