Abstract
The paper contemplates the importance of Leopold Heyrovský's position as one of the most influential professors at Charles University in the late 1800s. His textbook, as the first Czech-language textbook of Roman law, was first published in a position to be able to set forth the thesaurus of the Czech private-law legal terminology which is still used today.
In this context, the paper offers an overview of the preceding position of the Czech language in the legal system.