Győző Concha’s book “Politika”, published in 1895, is still relevant for the understanding of the theoretical problems in constitutional law. Thus, it is important to analyse the peculiar use of constitutional terms in his theory in order to understand his unique interpretation of the concept of the constitution and its relevance for political and legal philosophy.  The methodological goal of the research is to present the meaning of the concepts used by Concha, and to highlight their functional role. It is also an important question as to how Concha’s constitutional theory was incorporated into his political philosophy, and how these concepts are interpreted in today’s political and legal terminology. It is also the paper’s aim to “translate” Concha’s vocabulary and constitutional theory into the language used in 21st century constitutional theories, and to present and evaluate the relevance of his constitutional theory in understanding the current constitutional problems of political communities.