This diploma thesis deals with the constitutional development of the Republic of Korea (South Korea) since the state was founded in 1948. In the period studied, South Korea experienced unprecedented development in many respects. From a country governed by a dictatorship for a number of decades, always conscious of the threat of the Communist-led North, to a now functioning and modern democracy, and from a desperately poor country that was completely devastated by the Korean War, to one of the leading industrial nations in the world. After a brief historical analysis of the Korean Peninsula up to its division and the outbreak of the Korean conflict, the starting point of this thesis is the Constitution of the First Republic. A brief history is followed by an analysis of the constitutional text. The focus of this paper is the juxtaposition of constitutional law and constitutional reality, which often differ widely in the relatively short history of South Korea. This schema of the juxtaposition of the constitution and constitutional reality is then applied to all constitutions up to the current constitution (the 1988 Constitution of the Sixth Republic), whereby consideration is given to the political genesis of each era. This paper is divided into eight chapters. The first chapter deals with a brief theoretical discourse on the constitutional concept. This is followed by a presentation of an historical overview up to the foundation of the state. The following chapters deal with the constitutional analysis of the constitutional texts of the individual republics, including the comparison with constitutional reality. The final chapter summarises the content of the thesis and provides an outlook on forthcoming constitutional challenges, in particular the issue of Korean Peninsula Reunification.