Aegisthus was a figure in Greek mythology. Aegisthus is known from two primary sources: the first is Homer's Odyssey, believed to have been first written down by Homer at the end of the 8th century BC
Aegisthus being murdered by Orestes and Pylades – The Louvre
Orestes kills Aegisthus on a second-century Roman sarcophagus, Pio Clementino Museum.
Pierre-Narcisse Guérin's Clytemnestra and Agamemnon, in which Aegisthus appears as a shadowy figure pushing Clytemnestra forward
In Greek mythology, Orestes or Orestis was the son of Agamemnon and Clytemnestra, and the brother of Electra and Iphigenia. He was also known by the patronymic Agamemnonides, meaning "son of Agamemnon
Aegisthus
…the king's return, making Aegisthus king of Mycenae once more. Aegisthus ruled for seven more years before his death at the hands of Agamemnon's son Orestes. Thyestes felt he had been deprived of the Mycenean throne unfairly by his brother, Atreus. The two battled back and forth several times. In addition…
Orestes being purified by Apollo, red-figure bell-krater, 380–370 BC
Orestes at Delphi flanked by Athena and Pylades among the Erinyes and priestesses of the oracle, perhaps including Pythia behind the tripod – Paestan red-figured bell-krater, c. 330 BC
Orestes, Elektra, and Pylades at the tomb of Agamemnon - Campanian red-figure hydria, c. 330 BC
Orestes and Iphigeneia on an antique mosaic, Musei Capitolini