In the thesis I have tried to capture the shifts in the perception of the Karlštejn Castle in the historical memory of the Czech and German society in a wider political-cultural context. The Czech nationalists saw the castle as a symbol of the Czech nation's fate, because the nation lived through the time of its foremost glory during the reign of Emperor Charles IV. But their symbol was mostly neglected and forgotten in their time. Amongst the Germans, the romantic idea of the Karlštejn Castle having been built according to a mythical castle known from the Holy Grail legends was widespread. The building, then in decay, was thoroughly reconstructed between the 1880s - 1890s. The reconstruction was done by the renowned architects of that time...