EN
Via analysing the fresco decoration of the Piarist Church in Prievidza by Viennese painter Johann Stephan Daniel Bopovsky-Bujak (1751 - 1753), the paper takes a closer look at the activities of the Piarist Order in Central Europe, beside the Jesuits the second most prominent educational order of the Counter Reformation, established by St. Joseph Calasanz in 1597. The early arrival of the order in the Czech Lands (Mikulov, 1631), invited by Francis of Dietrichstein, Olomouc Archbishop and later Cardinal, and Slovakia (Prievidza, 1666) - earlier than in Germany or Spain - is answerable by the friendship of the Aragonian saint with the cardinal, and by their contacts with blessed Domingo Ruzola, an important figure in the Battle of the White Hill (1620).