1 Terrorism in criminal law in the context of evolution of Czech legislation since 1918 Abstract This document covers the evolution of antiterrorist legislation and related legislation since 1918 on the territory of Czechoslovakia. To start with, the concept of terrorism is defined in the introduction in order to set up the wider issue that is covered in the remainder of the text. Four key moments in history that correspond to the definition of terrorism with the relevant law regulations applied have been chosen for the analysis. The aim is to demonstrate readiness of the institutions to address this specific area of criminal justice in their time. At the same time, this paper illustrates the ever changing understanding and terminology related to the crimes, depending on the context and subject that might be adjudicating. The first event is the assassination of finance minister Alois Rasin during the era of the First Czechoslovac Republic. His politically motivated killing is firstly analysed on the basis of ruling of the State Court in the light of criminal law of the time. Follows an analysis from the point of view of the contemporary legal norms. Similar analytical approach is applied in the cases of assassination of Deputy/Acting Reich- Protector of Bohemia and Moravia Reinhard Heydrich during World War...