Fort 31 St. Benedict in Kraków

Photogrammetry Kraków – 3D Models

 

Fort 31 “St. Benedict” is located on Lasota Hill in Kraków’s Podgórze district, near the Krakus Mound and the small St. Benedict’s Church, from which the fort takes its name. It is a tower fort (artillery bastion) that was part of the Austrian Kraków Fortress – a system of fortifications surrounding the city since the mid-19th century. It was one of the first forts built on the southern (Podgórze) side of the Vistula River. Together with the now-lost forts “Krzemionki” and “Krakus,” it formed the so-called Podgórze bridgehead, controlling key transportation routes: the Viennese route (today’s Kalwaryjska and Wadowicka Streets) and the Lviv route (today’s Bolesława Limanowskiego and Wielicka Streets). The fort was intended to prevent Kraków from being bypassed from the south and to defend the city’s approaches. Thanks to its elevated location, the fort towered over the then-independent city of Podgórze.

 

History from construction to the present

The fort was built between 1853 and 1856, during the first phase of expanding the Kraków Fortress. It was designed by Feliks Księżarski – a renowned Kraków architect of the 19th century, also known for designing the Collegium Novum of the Jagiellonian University and Fort No. 2 “Kościuszko”. The fortification represents a rare type of artillery tower (a so-called Maximilian tower), inspired by innovative designs from the Austrian fortress in Linz. It was built on a regular 16-sided plan with an inner circular courtyard – similar towers were constructed in only a few European fortresses in the 19th century, and Fort 31 is one of the few that survived to this day. Interestingly, although the Austrians used cutting-edge military solutions at the time of its design, by the time it was completed, the fort was already outdated due to rapid advancements in siege artillery and firearms. In practice, Fort St. Benedict was the final chapter of the “brick-and-earth” fortress era – shortly after its construction, military defense concepts evolved, rendering such forts less useful.

Despite its limited combat value, the fort initially fulfilled its military role. It supported the citadel Fort 33 “Krakus” and, together with Fort 32 “Krzemionki”, defended the southern section of the Kraków Fortress. However, by 1905, during a modernization of the fortress, Fort 31 was disarmed and removed from the artillery system. The Austrians converted it into barracks. After World War I, when Kraków became part of reborn Poland, the fort lost all military significance. In the interwar period, it was repurposed for civilian use – communal apartments were arranged inside. During the communist era (PRL), it continued to serve as residential housing. Only in 1984 did the last residents move out, leaving the building abandoned.

Throughout its long history, Fort St. Benedict never played a major combat role – the Kraków Fortress as a whole was never besieged during World War I, and the fort did not see combat in the September Campaign of 1939 either. However, it did experience a brief military episode during World War II: during the German occupation, it was used as a small prisoner-of-war camp for French captives. This was an isolated event – for most of its history, the fort served civilian purposes, mainly residential. After being vacated in the 1980s, it remained a derelict structure for nearly 40 years. Numerous ideas for redevelopment were proposed (including selling it to a private investor), but funding and clear vision were lacking. Only recently has the fort’s unique historical value been appreciated, and concrete steps taken to give it new life.

 

Architectural and historical curiosities

Fort 31 “St. Benedict” is a unique structure in Poland. It is the only surviving tower fort of the Kraków Fortress and the last artillery fort of its kind in the country. Its name – commonly used since the 19th century – comes from the historic St. Benedict’s Church located nearby. The fort has the form of a massive, multi-sided tower with three combat levels surrounding a central courtyard. In its prime, it featured an artillery terrace at the top, from which cannons could cover the surrounding area. Księżarski’s design included many innovative features for the mid-19th century: a regular polygonal shape for all-around defense, vaulted casemates within the walls for protection against shelling, and a moat and earthen ramparts for added defense.

The fort has survived in relatively good condition, avoiding the fate of many other Kraków fortifications that were demolished in the 1950s. As a result, it is now a valuable monument of military architecture. In 1989, it was entered (along with its surrounding greenery) into the register of immovable monuments of the Małopolskie Voivodeship. For decades, it was a mysterious and inaccessible site on Kraków’s tourist map – it could only be visited during special events and tours organized by fortification enthusiasts. The wooded fortress hill concealed traces of its former glory, such as fragments of original steel shutters or faded polychromes on the brick walls. Interestingly, during conservation analysis, specialists discovered that the original façade was painted dark red – this color has been restored during the latest renovation, as seen on the refreshed brick walls today.

 

Renovation and new functions

After years of neglect, Fort St. Benedict is finally being restored. The renovation is funded by the City of Kraków and coordinated by the Municipal Buildings Authority (ZBK). The restoration and adaptation project was included in the city’s heritage revitalization programs and received financial support from the Social Committee for the Restoration of Kraków’s Monuments. Construction and conservation work began in May 2024, and the first phase was completed in July 2025 – after 14 months. Phase I focused on the renovation of the fort’s external and internal façades (including the inner courtyard walls). The specialist conservation company Antiqa, supervised by the city conservator, cleaned and strengthened the walls, repaired damaged bricks and stones, replaced deteriorated stone details (like window sills), and reconstructed missing elements such as shooting shutters and decorative gargoyles. Based on traces of historical paint, the original dark red façade color was restored, bringing back the fort’s 19th-century appearance.

The entire renovation project is divided into two main phases and is scheduled for completion by the end of 2026. Its total cost is approximately PLN 21.5 million. Phase II is planned to begin in late 2025 and will focus on adapting the fort’s interior to new functions. This will include renovation of the tower’s internal rooms and installation of utilities. According to the approved Functional and Utility Program, Fort 31 will become a modern educational center promoting science and technology among children and youth. The Museum of Engineering and Technology in Kraków will serve as the operator of the site, gaining new space for its public outreach activities. Once construction and furnishing are complete (end of 2026), the new educational facility is expected to open to the public around 2028.

It’s also worth noting that the revitalization team envisions the fort as a space not only for education but also for recreation. The adaptation plan includes a small café with a rooftop terrace, and a permanent historical exhibition dedicated to the fort itself and the renovation process.

3D Model

An exciting addition to the ongoing renovation efforts is the use of modern technologies to document the fort. Commissioned by the Municipal Buildings Authority, I created a georeferenced 3D model of Fort 31, based on over 7,000 digital photos as part of the “Kraków 3D” project. This detailed three-dimensional model allows virtual exploration of the fort from any angle, accurately reproducing its architectural features. The Kraków 3D project aims to build a digital collection of Kraków’s most important monuments, which in the future may form the basis for an innovative virtual city guide. As a “jewel of Podgórze,” Fort St. Benedict has now joined this digital archive – combining rich history with cutting-edge technology.