Mopsuestia ( and Μόψου Mopsou; Byzantine Greek: Mamista, Manistra; Arabic: al-Maṣṣīṣah; Armenian: Msis, Mises, Mam(u)estia; Frankish: Mamistra) is an ancient city in Cilicia Campestris on the Pyramus River (now Ceyhan River) located approximately 20 kilometers east of ancient Antiochia in Cilicia (present-day Adana, southern Turkey).