The treatise of Athenagoras

Athenagoras (/ˌ θəˈn ɡərəs/; Greek: Ἀθηναγόρας ὁ Ἀθηναῖος; c. 133 - c. 190 AD) was a Father of the Church, an Ante-Nicene Christian-apologist who lived during the second half of the 2nd century of whom little is known for certain, besides that he was Athenian (though possibly not originally from Athens), a philosopher, and a convert to Christianity.