Thomas A. Carlson (eds.), "Cathedral of Edessa" in The Beth Qaṭraye Gazetteer last modified January 10, 2020, https://bqgazetteer.bethmardutho.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.
                  
               
               
                  
                  
               
               https://bqgazetteer.bethmardutho.org/place/2927
               http://syriaca.org/place/2927
               
                  Kitāb al-aʿlāq al-nafīsa
                  Aḥmad ibn ʿUmar Ibn Rustah
                  
                  83