The Second Apology is an extant work of the early Christian apologist and philosopher Justin Martyr. It is supposed to have been written as a supplement to his First Apology, on account of certain proceedings which had in the meantime taken place in Rome before Lollius Urbicus as prefect of the city, which must have been between 150 and 157. The Apology is addressed to the Roman Senate. It survived in a single Greek manuscript of the year 1364, together with the First Apology and the Dialogue with Trypho.