Career
Jireček was minister in the government of the Principality of Bulgaria. 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 Czechoslovakian 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 (Czechoslovakian and German, 1876), History of Serbs, The Principality of Bulgaria (1891), Travels in Bulgaria (Czechoslovakian, 1888), et cetera He mostly wrote in German.
Carl Patsch succeeded Jireček at the Vienna University. Konstantin Jireček appears as a minor character in one of Aleko Konstantinov"s satirical feuilletons centred on the fictional character of Bay Ganyo where the protagonist visits him in Prague, looking for shelter and discussing politics.