The Epistle of Mathetes to Diognetus (Greek: Πρὸς Διόγνητον Ἐπιστολή) is an example of Christian apologetics, writings defending Christianity from its accusers. The Greek writer and recipient are not otherwise known; estimates of dating based on the language and other textual evidence have ranged from AD130 (which would make it one of the earliest examples of apologetic literature), to the late 2nd century, with the latter often preferred in modern scholarship.