The First Apology was an early work of Christian apologetics addressed by Justin Martyr to the Roman EmperorAntoninus Pius. It is dated to the period 150-155. Topics in Christianity Movements · Denominations Ecumenism · Preaching · Prayer Music · Liturgy · Calendar Symbols · Art · Criticism Important figures Apostle Paul · Church Fathers Constantine · Athanasius · Augustine Anselm · Aquinas · Palamas · Wycliffe Tyndale · Luther · Calvin · Wesley Arius · Marcion of Sinope Pope · Archbishop of Canterbury Patriarch of Constantinople Christianity Portal This box: Christian apologetics is the... Justin Martyr (Justin the Martyr, also known as Justin of Caesarea) (100 â 165) was an early Christian apologist. ... This article or section does not cite its references or sources. ... Titus Aurelius Fulvus Boionius Arrius Antoninus Pius (September 19, 86âMarch 7, 161) was Roman emperor from 138 to 161. ...