The main topic of the final paper is organisational theory. Organisational theory examines the structure, functioning and performance of organisations as well as the behaviour of individuals and groups within these organisations. In addition, organisational theory integrates insights from various disciplines, including sociology, administrative science, psychology, anthropology and management, to understand how organisations function, develop and interact with their environment. Starting from the definition of basic terms (theory and organisational theory), and based on a review of scientific and professional literature, this paper presents and analyses classical and neoclassical organisational theory, macro theories and meta organisational theories, as well as some elements and forms of contemporary organisations. Contemporary organisations have an organisational structure based on teams, networks and cooperation. The main concept is the expansion of activities in which challenges can be taken on more easily. Contemporary organisations are more dynamic and have a variety of business strategies.