Arthania (Arabic: ارثانية‎‎ ’Arṯāniya, Russian: Арcания) was one of the three tribes of the Rus or Saqaliba (early East Slavs) with the center in Artha described in a lost book by Abu Zayd al-Balkhi (dating from ca. 920) and mentioned in works by some of his followers (Ibn Hawqal, Al-Istakhri, Hudud ul-'alam). The two other centers were Slawiya (Arabic: صلاوية‎‎ Ṣ(a)lāwiya; tentatively identified with the land of Ilmen Slavs, see Rus Khaganate) and Kuyaba (Arabic: كويابة‎‎ Kūyāba; usually identified with Kiev).