During the time of the Austro-Hungarian Empire in the late 1800s and early 1900s, Czechs were the largest non-German speaking population in Vienna.
After the fall of the Austro-Hungarian Empire and the independence of Czechoslovakia, many of the Viennese Czechs returned to their homeland.
[1] After Ottokar II's death in the Battle on the Marchfeld, his embalmed body was initially kept in the Minorites Church before his burial in Prague, whereas his heart was buried in the Saint Catherine Chapel in Vienna.
[3] After World War I, many Czechs and other nationalities returned to their ancestral countries, resulting in a decline in the Viennese population.
Czechs were among the prisoners of the Vienna-Schönbrunn subcamp of the Mauthausen concentration camp operated in the city during World War II.