Antonius, Marcus, 83 B.C.?-30 B.C.
Roman politician, general, triumvir, and relative of Julius Caesar, known presently as "Mark Antony." Antony played a large role in the shifting of the Roman Republic to the Roman Empire, forming a three-man dictatorship with Marcus Aemilius Lepidus and Octavian known as the Second Triumvirate following the assassination of Caesar. Although Antony married Octavian's sister, Octavia, he continued his love affair with Cleopatra VII of Egypt.