In Greek mythology, Harmonia (/hɑːrˈmoʊniə/; Ancient Greek: Ἁρμονία /harmoˈnia/, "harmony", "agreement") is the goddess of harmony and concord. Her Greek opposite is Eris and her Roman counterpart is Concordia. Harmonia is most well-known for her marriage to Cadmus and the many misfortunes that haunted her descendants, particularly those related to the fabled Necklace of Harmonia.