EN
On the utility of Castles and Chateaux 100 years later. Looking back at the great historical project: August Sedláček is correctly considered to be the founder of Czech research of medieval castles. His monumental work “Castles, Chateaux and Strongholds” has been the main source of knowledge to this day. The study deals not only with Sedláček’s contribution to the history of Czech castles, but also notices the external literary form of his work. It shows us August Sedláček as a perceptive observer and reliable guide in the description of individual castle localities. Furthermore, also the importance of Sedláček’s card file for today’s generation of researchers and the utility of its digitization is underlined in the article.