File:Bust of Marcus Aurelius Probus in Musei Capitolini.jpg - Wikimedia Commons

Marcus Aurelius Valerius Maximianus Herculius (Maximian) Augustus (0247-0310)

Marcus Aurelius Roman Emperor Stoic Philosopher Bust

Bust of Emperor Marcus Aurelius from Lamunia (Illustration) - World History Encyclopedia

File:Bust of Marcus Aurelius (2).jpg - Wikimedia Commons

Gallienus - Turkcewiki.org

Caesar marcus aurelius hi-res stock photography and images - Alamy

File:1677 - Archaeological Museum, Athens - Marcus Aurelius - Photo by Giovanni Dall'Orto, Nov 11 2009.jpg - Wikimedia Commons

Hadrian - Wikipedia

Trajan - Wikipedia

Why did Rome have so many bad emperors? - Quora

Giacobbe Giusti

Probus (emperor) - Wikipedia

Rome. Italy. Portrait bust of Roman Emperor Marcus Aurelius (121-180 AD), 161-180 AD, Capitoline Museum. Musei Capitolini Stock Photo - Alamy