The Marrucini were an Italic tribe that occupied a small strip of territory around the ancient Teate (modern Chieti), on the east coast of Abruzzo, Italy, limited by the Aterno and Foro Rivers. Other Marrucini centers included Ceio (San Valentino in Abruzzo Citeriore), Iterpromium (whose ruins are under the Abbey of San Clemente at Casauria), Civitas Danzica (Rapino), and the port of Aternum (Pescara), shared with the Vestini.