Pisidice of Methymna

In Greek mythology, Pisidice (/paɪˈsɪdɪsiː/ py-SEE-dee-see; Ancient Greek: Πεισιδίκη, romanized: Peisidíkē) is a native of Methymna, an ancient Greek city state in the north of the island of Lesbos in the northeastern Aegean Sea. Pisidice is notable for her love for the hero Achilles who waged war against her homeland. Pisidice's infatuation with him was so great that she willingly betrayed her home city for his sake on the promise Achilles would marry her, but after conquering Methymna the hero put her to death for treason.

Her story has many shared elements with other heroines who betrayed their besieged fatherlands after falling in love with the enemy, only for their supposed lovers to punish them accordingly for treachery, while at the same time reaping the benefits of the women's treason. It also seems to be part of an old but obscure tradition of Achilles raiding and capturing the cities of the northeastern Aegean.