Thyestes killed Atreus. While Thyestes ruled Mycenae, the sons of Atreus, Agamemnon and Menelaus, were exiled to Sparta. There, King Tyndareus accepted them as the royalty that they were. Shortly after, he helped the brothers return to Mycenae to overthrow Thyestes, forcing him to live in Cytheria, where he died. As a token of good will and allegiance, King Tyndareus offered his daughters to Agamemnon and Menelaus as wives, Clytemnestra and Helen respectively. When Agamemnon left Mycenae for the Trojan War, Aegisthus seduced Agamemnon's wife, Clytemnestra, and the couple plotted to kill her husband upon his return. They succeeded, killing Agamemnon
Duke of Sparta Duke of Sparta Duke of Sparta () was a title instituted in 1868 to designate the Crown Prince of the Kingdom of Greece. Its legal status was exceptional, as the Greek constitution forbade the award or acceptance of titles of nobility for Greek citizens. Consequently, it was mostly used abroad, although also in unofficial use within Greece. In 1868, when the Crown Prince Constantine (later king as Constantine I) was born, King George I issued a decree according to which Constantine, as well as any future heir to the Greek crown, would bear the title "Duke of Sparta". However, this