On the official medical doctrine in Bulgaria after establishment of Christianity as a state religion.
The author has been studying the problem of Bulgarian national diet tradition in the ninth and tenth centuries for thirty years. In the course of the research, it was necessary to elucidate what medical knowledge the Bulgarians at that time possessed. The analysis revealed an orderly medical doctrine functioning immediately after the conversion of Bulgaria to Christianity and meeting the requirements of the new faith. As early as the tenth century, converting other peoples to Christianity (the Slavonic tribes primarily), Bulgarians imposed their medical doctrine as part of the Christian propaganda among the newly converted communities. This is one of the contributions of the Bulgarian medieval civilization to the world of that time, a contribution that is not well known and therefore not assessed on its merits.