Thomas A. Carlson (ed.), "Cathedral of Edessa" in last modified August 9, 2017, http://syriaca.org/place/2927 Cathedral of Edessa كنيسة الرها The main church of Edessa Attestation of name كنيسة الرها in the Kitāb al-aʿlāq al-nafīsa of Aḥmad ibn ʿUmar Ibn Rustah. http://syriaca.org/place/2927 Kitāb al-aʿlāq al-nafīsa Aḥmad ibn ʿUmar Ibn Rustah 83