<prompt> Bhala ukuqhubeka kwalesi sigaba - NgokukaProcopius De Aedificiis, 4.3.5, uDemetrias wakhiwa kabusha nguJustinian I r. 527565, kodwa obunye ubufakazi bukhomba ukuthi kungenzeka ukuthi impilo yasemadolobheni yasendulo kungenzeka ukuthi yayisiphelile ekuqaleni kwekhulu lesi-6 T.E. Gregory. UDemetrius kukhulunywa ngaye nguHierocles ngekhulu lesithupha leminyaka. Insimu yayo yahlalwa yisizwe samaSlav saseBelegezitai ngekhulu lesi-78th, sahlaselwa saphangwa amaSaracen ngo-9012, futhi ngabavukeli ngesikhathi sokuVukela kukaPeter Delyan  <response>: ngonyaka ka-1040. 