Daniel L. Schwartz (ed.), "Serdica — ܣܪܕܝܩܐ " in last modified August 8, 2018, http://syriaca.org/place/2715
   
      
         
            
               Serdica
               ܣܪܕܝܩܐ
               Sardica
               ܣܪܕܝܩܐ
               A city in Thrace, modern Sofia in Bulgaria
          
               http://syriaca.org/place/2715
               https://pleiades.stoa.org/places/207439
               
                  
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