 Nyorai kuenderera mberi kweiyi ndima - Demetrius aive wechipiri Patriarch weBulgarian Orthodox Church uye wekutanga kuzivikanwa neEcumenical Patriarch weConstantinople semhedzisiro yeByzantineBulgarian Treaty ya927, iyo yakasimbisa kukunda kweBulgaria muHondo ya913927mukurwisana neUmambo hweByzantium. Demetrius akatungamirira Bulgarian Patriarchate mumakore okutanga okutonga kwamambo Peter I r. 927969. 