Tyche was originally a Greek goddess of chance but she was converted to a goddess of prosperity with cities under her protection. Tyche is depicted with a cornucopia, rudder, wings, wheel and ball. Fortuna is the Roman goddess of chance or fortune. Tyche is either one of the Oceanids (daughters of Oceanus and Tethys) or a Moirae (the Fates). Tyche is sometimes comfused with Ananke (Necessity).