A survey of the constitutional jurisprudeice relating to substantive criminal law

The Constitutional Court has many decisions regarding substantive criminal law through norm control. Among these decisions, the ones related to the legality principle of crimes and punishments and the principle of proportionality constitute the subject of this thesis. In the first part, general information as to the concept of the supremacy of the constitution and fundamental principles of the substansive criminal law were examined. In the second part of the study, the legality principle of crimes and punishments and the principle of proportionality were explained. Afterwards, the decisions of the Constitutional Court regarding the substantive criminal law through norm control were examined under separate titles. As a result of this examination, answers were sought to questions such as how the Constitutional Court interpreted these principles and sub-principles of these principles, and what it understood from these principles. In order to find answers to these questions, the mentioned decisions of the Constitutional Court were examined one by one and also as a whole, and it was revealed how the Constitutional Court approached these principles in terms of substantive criminal law.