This text is a record of a speech given during the Third Polish Conference of Chairs and Departments of Political Systems. The main subject of this paper is the need to carry out research on political systems using diverse methods and takes, both legal and “humanistic”. The paper shows how important in terms of methodology it is to compare particular legal status with reality using examples when legal analysis is not sufficient, for example, on the account of social rebellion. The text identifies challenges that researchers of political systems face due to that fact. In this context is also discusses the problems related to studying such institutions as, for example, the Ukrainian Maidan.