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Konstantin Josef Jireček
Konstantin Josef Jireček (pronounced as \jiretʃek\)(July 24, 1854, in Vienna — January 10, 1918, in Vienna), son of Josef Jireček, was a Czech historian, diplomat and slavist.
He entered the Bulgarian service in 1879, and in 1881 became minister of education at Sofia. In 1884 he became professor of universal history in Czech at Charles University in Prague, and in 1893 professor of Slavonic antiquities at the University of Vienna.
The bulk of Konstantin's writings deal with the history of the southern Slavs and their literature. They include a History of the Bulgarians (Czech and German, 1876), History of Serbs, The Principality of Bulgaria (1891), Travels in Bulgaria (Czech, 1888), etc. He mostly wrote in German.
Carl Patsch succeeded Jireček at the Vienna University.