The thema of the diploma work is the language analysis of baroque religious text of V. V. J. Klugar - Catechism (1746). The diplome oves the characteristic of the phonological side of its language. First we informe generally about the baroque, about the life and work Klugar. Then we compare the Czech language in the epoch of humanism and baroque and we describe the important grammar and too the ungrammatical phonological terms. Next we analyze the separate texts (dialogical and monological) where we study language in phonetics. We works with copy of the origin deposit in the archiv in the museum in the Jaroměř, sg. Ač 6. The aim of the analysis is to state the level of Czech language in the 18 century and the level of the religious texts on the base of discoveries and graphic data.