Marcus Aurelius was a Roman emperor who ruled from 161 to 180 AD. He is known for his philosophical treatise "Meditations," in which he reflects on the Stoic philosophy of living in accordance with reason and virtue. Marcus Aurelius was considered a wise and just ruler, and he is often considered one of the Five Good Emperors, a group of Roman emperors who are known for their relative peace and prosperity during their reigns. Marcus Aurelius was also known for his military campaigns against barbarian invasions, and he is remembered as a philosopher-emperor who tried to apply the principles of Stoicism to his own life and to his rule. Overall, Marcus Aurelius is generally viewed as a positive historical figure who is remembered for his wisdom and his commitment to justice.