Ostrava castle (North Moravia, Czechia)
Project Introduction
This project focused on the reconstruction of the Slezská Ostrava Castle through a digital 3D model. Using modern LiDAR data of the current terrain as a foundation, the aim was to recreate the castle’s original appearance before its decline and structural damage caused by mining and neglect. The resulting model combines authentic topography with historically informed architectural features, offering a realistic view of how the castle complex once stood.
Historical Background
The castle was first mentioned in written sources in 1297 and played an important role as a strategic fortification on the border of Moravia and Silesia. Throughout the centuries it was rebuilt and expanded, especially during the Renaissance, when it became a noble residence. However, beginning in the 19th century, intensive coal mining in the region caused subsidence and serious structural damage. By the 20th century, the complex had largely fallen into ruin. Today, thanks to conservation efforts and digital reconstruction, the castle’s past can once again be appreciated in its original form.
Preparation of Materials
The preparation of the project was made possible thanks to the extensive documentation provided by the client. Among the most important resources were LiDAR survey data, which captured the present-day topography of the castle hill and its surroundings, and a detailed 3D model of the current state of the ruins, serving as a reference for proportions and placement within the terrain. Historical photographs were also made available, documenting the castle in periods before the most significant phases of destruction. A key element of the archive consisted of architectural surveys carried out in 1974 by the State Institute for the Reconstruction of Historical Monuments, which contained precise measurements of selected buildings. In addition, a variety of cartographic sources and maps were consulted, providing essential information on spatial relations and the broader layout of the site.
Based on this combination of historical and technical materials, it became possible to embark on the 3D reconstruction of the castle’s original appearance as it may have stood at the beginning of the twentieth century, before the effects of mining subsidence and long-term neglect led to its gradual degradation.
Final output
The final result of the project is a digital reconstruction of the Slezská Ostrava Castle, presented in a 3D form that captures its original appearance from the early 20th century. This model was created by combining LiDAR data of the current terrain with historical documentation, including archival photographs, surveys from 1974 conducted by the State Institute for the Reconstruction of Historical Monuments, and additional cartographic sources.
The reconstruction shows the castle before the destructive impact of coal mining and long-term neglect, when the buildings still retained their authentic shape and proportions. By integrating architectural accuracy with atmospheric detail, the model provides both an educational tool for the public and a valuable reference for researchers interested in cultural heritage. This final output does not only illustrate the castle as it once stood, but also demonstrates the potential of modern digital methods in preserving and reviving historical memory. It highlights the importance of interdisciplinary collaboration between advanced technologies, archival resources, and historical expertise.
Castle exterior visualization
Model usage
It is worth noting that the castle today is preserved not only through digital reconstructions and scale models, but also through ongoing conservation and renewal projects. Selected parts of the castle complex are currently under restoration, ensuring that this landmark of Ostrava’s cultural heritage will remain accessible and appreciated by future generations.
The reconstructed model of the Slezská Ostrava Castle has now joined a broader collection of works by other model makers, each of whom focused on different building phases and architectural epochs of the castle’s long history. Alongside digitally generated models, the exhibition also features physical scale models, which together provide visitors with a comprehensive view of how the fortress evolved across centuries. These models are currently on display in the permanent castle exhibition, where they illustrate the transformations of the site from its medieval origins through periods of expansion and decline.
