This bachelor thesis discusses the congress industry and has a purpose to describe briefly the organization of conferences at a chosen hotel. The paper describes the main international organizations in the congress industry, explains what congress hotels are, the importance of professional organizations and how these organizations contribute to the profitability of hotels. The Hotel Esplanade, which is taken as an example, shows what is needed for the organization of a single conference, the available capacities, the available conference equipment and the position of the hotel concerning the main traffic hubs. The paper aims to describe what it takes to organize a single conference at a hotel. Five hotels from Zagreb and Dubrovnik, which are the main congress destinations in Croatia, were processed for comparison in order to gain a better understanding of the congress organization and the role of the hotel in this. For that purpose, a questionnaire was sent to the chosen hotels. The author collected the majority of data for this thesis from the expert literature and Internet sources specialized in congress topics. A certain amount of data was collected through research with special reference to the Esplanade Hotel, which showed that hotels are doing well in their area of organization of conferences, but that there is also room for improvement. In the end, it can be concluded that hotels should make additional investments into appropriate equipment and expand their congress facilities. In that way, they would attract more prestigious international congresses to their facilities.