Francis Dvornik

Francis Dvornik (; 14 August 1893 – 4 November 1975) was a Czech academic medievalist, byzantinist, slavist and Catholic priest. He was one of the leading 20th century authorities on Slavic and Byzantine history and matters related to the churches of Rome and Constantinople. For almost three decades, he was a professor of Byzantine history at the Dumbarton Oaks Center for Byzantine Studies of Harvard University. Provided by Wikipedia