The diploma thesis deals primarily with the so-called first stage of the nationalization process in Czechoslovakia, which took place between 1945 - 1948, and the post-war confiscations of the same period, as well. The objective of the thesis is particularly to describe and analyze the then relevant legal regulations and place them adequately in the historical context. The content of the five thematic chapters is adapted to this topic. First, it attempts to define the basic concepts of nationalization, appropriation, socialization, expropriation and confiscation. Subsequently, it examines the basic historical roots of the concept of nationalization. It does so especially by comparing the approaches to proprietary rights through the prism of two dominant ideologies, namely liberalism and socialism. The core of the thesis consists of the nationalization and confiscation decrees themselves and the issues related. The National Institute of Administration was closely associated with this issue, as well. From the legislator's point of view, it was also necessary to distinguish which assets were to be confiscated and which, on the other hand, nationalized. The film industry first, followed by mines and large industrial enterprises, the food industry, banking and insurance companies were subject to..