Berenice IV Epiphaneia (Ancient Greek: Βερενίκη; c. 70s BC–55 BC, born and died in Alexandria, Egypt) was ruling Ptolemaic queen and Hellenistic pharaoh of the Ptolemaic kingdom. From 58 to 55 BC, Berenice IV ruled Egypt during the political exile of her father Ptolemy XII Auletes to Rome. She was co-ruler of Egypt with Cleopatra VI from 58 to 57 BC, but became sole ruler in 57 BC. On the return of Ptolemy XII to Egypt with Roman military aid and an army led by Aulus Gabinius, Berenice IV was overthrown and executed by her rival father, who later bequeathed his throne to his daughter Cleopatra VII and son Ptolemy XIII as co-rulers.
Biography
Berenice IV was the daughter of Ptolemy XII Auletes and Cleopatra V Tryphaena of the Ptolemaic Kingdom. She was probably born in the early 70s BC. Berenice was sister to queen Cleopatra VII, kings Ptolemy XIII Theos Philopator and Ptolemy XIV, and princess Arsinoe IV. It is unclear whether the younger children of Ptolemy XII were born to Cleopatra V or a different woman.
In 59 BC Julius Caesar was one of the consuls of Rome. It was believed that the annexation of Egypt was part of his own political programme, the excuse being that the king of Egypt, Ptolemy XII Auletes, was illegitimate and had no right to rule. Ptolemy Auletes responded by buying Caesar's support at huge expense, and the Romans passed a law to recognise Ptolemy Auletes as legitimate king of Egypt. The treaty however said nothing about Cyprus, where another Ptolemy, the brother of Ptolemy Auletes, was king.
In 58 BC the Romans annexed Cyprus, forcing the deposed king and brother of Auletes into suicide. The loss of Cyprus, and the poor state of the Egyptian economy following the bribes to Caesar, triggered civil unrest in Ptolemy Auletes' capital Alexandria. Unable to quash the unrest on his own, Ptolemy Auletes went in 58 BC to Rome to ask for military support, leaving his family behind in Egypt. In his absence, the Alexandrines declared him deposed, and in his place nominated his daughter Berenice IV Epiphaneia and (according to the ancient historian Porphyry) "[Auletes'] eldest daughter" Cleopatra VI Tryphaena as joint monarchs. Some, though not all, modern historians believe Porphyry made an error here, and that Cleopatra VI Tryphaena was in fact Ptolemy XII Auletes' wife Cleopatra V Tryphaena. Porphyry is the only source to mention the existence of a fourth daughter of Ptolemy XII, but this does not disprove the idea that he had an additional daughter named Cleopatra VI.