On the one hand, the aim of this paper is to describe and afterwards analyze the situation that prevailed in the Slovak society at the first half of the 20th century towards to the question of the remained ruin of the Bratislava castle. This majestic medieval building, that stood on the hill upon the Danube for centuries burnt out by a tragic coincidence in the 1811 and became ruin for another 150 years. From this point, the huge question about the further usability of the castle hill and the Castle itself was raised. On the other hand, the aim is to search for an analogy in the middle Europe and compare it with the case study in Slovakia (former Czechoslovakia/Slovak State), in order to create an image, that could be pictured in a wider, European context. The goal is to create an analysis of two case studies, based on selected comparative parameters that are common for the both cases. Interesting from the point of analysis is the comparison with the castle in the capitol city of Slovenia - Ľjubľana that fulfills these parameters. There were several competions, visions, studies, that appeared during the monitored time period. For example, the goverment of a former fascist Slovak state decided to organize an international architectural competition that ran in the year 1942. It was supposed to bring new ideas and solutions for this area and basically completely change the face of the city. The main function, was defined as a new Slovak university campus and complex of hospitals. From the 19 designs, there was no direct winner. The highest valuation was given to the proposal of the brothers Ernesto and Atillio La Padula from Rome. These, and some other names, are some of the most interesting architects that appeared among the participats. This brings to the topic interesting perspectives that could be analysed in a European dimension. Even with comparison with similar situation in Ľjubľana, when famous Slovenian architect Jože Plečnik designed the study of the Ľjubľana castle revitalization and came with some fascinating ideas. Lot of the designs brought interesting ideas, some of them, perhaps visionary. These are, even nowadays, raising, turbulent discussions among professional and general public. The approach of the architects to solving this difficult task is currently still interesting for analysis, even in relation with the current ongoing renovation of the Bratislava castle. Setting the Bratislava castle situation in the European context seems to be important feature, regarding to the fact that this was almost never done in the Slovak architectural history science. [ABSTRACT FROM AUTHOR]