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Secret underground city beneath Sopron: What is hidden under the cobblestones that most Hungarians haven’t even heard of?

The Secret City Beneath Sopron: What Lies Underneath the Cobblestones That Most Hungarians Have Yet to Discover?

Sopron, Hungary’s western gateway, with its captivating medieval heritage and mysterious ambiance, can easily make visitors forget: beneath its cobbled streets lie hidden layers of history, forgotten stories, and perhaps underground remnants of a city. While Sopron’s historic center is already a remarkable site, few know about a legendary place – the Cobblestone Castle – whose story, medieval role, and mysterious disappearance continue to intrigue explorers and travelers to this day.

In this article, we will delve into the suspected location and rich history of the Cobblestone Castle; explore the legendary tales of underground tunnels, secret escape routes in Sopron; and discuss how this all has become an integral part of the city’s cultural tourism.

Join us as we uncover Sopron’s hidden side, which remains largely unknown even to most Hungarians! Let’s immerse ourselves in the intersection of history, myth, and reality, and uncover what the cobblestones conceal in this west-transdanubian city.

History and Medieval Role of the Cobblestone Castle

Sopron’s medieval past is filled with drama, change, and military conflicts that continue to shape the city’s identity today. The Cobblestone Castle, built around 1441 by Sigmund Ebersdorfer, the Palatine of Sopron, was born during such turbulent times.

During the Middle Ages, Sopron frequently came into conflict with Hungarian and Austrian rulers as well as Hussite fighters. The region was home to several robber castles and strategic fortifications; however, the Cobblestone Castle played a key defensive role for the city at its time. Its primary purpose was to ward off Hussite attacks, which were common in the early 15th century.

The fortress and its associated underground tunnel system were designed to provide escape routes and secret communication channels for Sopron’s leaders and citizens in emergencies. The significance of the Cobblestone Castle is highlighted in contemporary chronicles and its importance in resisting Hussite movements of the period.

The story is also closely linked to King Matthias Corvinus, who around 1465 ordered the castle’s destruction because, under the political circumstances of that era, it no longer served the city’s interests and he feared it might become a haven for rebels or bandits. With its destruction, many of its secrets were buried beneath the earth, but its legend survived through the centuries.

Although many other castles rose across medieval Hungary, the Cobblestone Castle played a unique role in Sopron’s defense system and its historical identity. This is evidenced by the living historical myths within the city, tales of robbers’ castles, and its part in medieval Hungarian history.


Reconstructed view of the medieval Cobblestone Castle near Sopron.

Where Was the Cobblestone Castle? – Archaeological Clues and Legends

The actual location of the Cobblestone Castle remains a subject of debate among historians and archaeologists, as few definitive archaeological finds exist. For a long time, remnants of lime kilns near Fertőrákos were mistaken for the castle ruins, but recent research suggests these were incorrect assumptions.

Currently, scholars believe the castle was likely situated in the Katzendorfer Dűlő or Hausbergen areas, near the southern or southwestern border of Sopron city, where natural terrain features, hills, vineyards, and strategic roads converge. These locations provided excellent sites for a medieval fortification, offering good visibility over the surroundings and access routes.

Our sources about the castle’s remains are limited: 19th and 20th-century writings, local chronicles, and folklore often mention a forgotten robber castle erected and destroyed during the harsh Middle Ages. Interestingly, Béla Szakonyi’s memoirs from the 20th century also mention Sopron’s secret tunnels, which may have served as refuges and escape routes.

Archaeological excavations have uncovered only scattered finds—some carved stones, clay vessels, or metal remnants—but none definitively pinpoint the precise location of the castle. Nonetheless, local ethnographic research and legends continue to preserve the memory of the castle among residents of Sopron and Fertőrákos.

Numerous sources, including the Sopron Media summary, suggest various possible sites for the castle. Visiting these locations offers not only a historical adventure but also a memorable experience for nature enthusiasts.


Hausbergen area in southern Sopron, suspected site of the Cobblestone Castle.

Underground Tunnels and Secret Passages Beneath Sopron

Beyond visible ruins, Sopron harbors a lesser-known facet: a network of secret tunnels, escape routes, and underground chambers. Their existence is part historical reality and part rich folklore, myth, and legend.

Medieval towns often featured multifunctional tunnel systems: storage chambers, dungeons, bomb shelters, and secret escape routes underground. Local legends attribute many such tunnels to Sopron, especially those connected with the Castle era. Many believe that some of these passages still exist today, either as former escape routes or storage rooms.

Despite limited archaeological evidence, the city’s historians have collected references from the past two centuries regarding these underground passages. Béla Szakonyi’s writings, for example, mention tunnels running beneath the medieval Sopron, described as integral parts of the city’s underground landscape, serving as refuges, warehouses, or communication channels for city officials.

For visitors, there are tangible remnants: several underground sections, cellars, and tunnels in the city center—such as near the Fire Tower, Várkerület, or the Main Square—have been excavated or partially explored. Guided tours by local restorers and museum experts are available, with some storerooms still in use by businesses today.

Anyone visiting Sopron can immerse themselves in this intriguing world. Locals enjoy sharing stories from family legends, and local guides actively recommend exploring the underground sites. While the full extent of Sopron’s underground city remains a mystery, it has earned a lasting place in the city’s collective memory and cultural identity.


Medieval cellar tunnel in Sopron’s town center, part of the underground city’s hidden realm.

Cultural Heritage and Tourism Significance of the Cobblestone Castle

Although the Cobblestone Castle no longer exists physically, it has become an indispensable part of Sopron’s intellectual and cultural heritage. In recent years, interest has grown in medieval castles, fortifications, and the city’s secret tunnel systems, which have invigorated regional tourism.

Thematic tours organized by organizations such as Visit Sopron offer visitors a chance to learn about medieval Sopron’s history, mythological traditions, and underground secrets through personal experiences.

The legend of the Cobblestone Castle and the tunnels has become a shared memory and a vital part of the city’s identity. Schools, cultural groups, and regional researchers regularly organize lectures and themed days to keep Sopron’s hidden past alive and introduce it to younger generations.

It’s no coincidence that walking tours in Sopron often include visits to legendary sites of the Cobblestone Castle and the city’s underground secrets. Many archaeological finds in the area, documented online at Sulinet Heritage Archive, further attest to this enduring legacy.

For those eager to explore deeper medieval layers of Sopron, guided historical tours discussing Hussite invasions, the legend of the robber castle, or the political and military roles of regional fortresses in the 15th century are highly recommended. These experiences offer new perspectives and enrich the overall city adventure.


Guided historical tour walking through cobbled streets of Sopron.

Accommodation Recommendations in Sopron

To fully immerse yourself in Sopron’s charm, aside from exploring medieval castles and underground secrets, selecting the right accommodation is key. The city offers a wide range of options, among which the Hotel Szieszta stands out as one of the most renowned, popular, and largest hotels in Sopron, nestled in the scenic Lövér hills.

The Hotel Szieszta is an ideal choice for travelers seeking comfort within walking distance of the city’s historical core, yet in a tranquil, forested area with clean air. Guests can choose between traditionally furnished rooms with panoramic views or modern apartments, and enjoy amenities such as a wellness area with a sauna, steam bath, indoor pool, and a full spa service.

Family-friendly services, a generous buffet breakfast, free parking, sports courts, a playground, and friendly staff make Hotel Szieszta a top selection for tourists visiting Sopron—ideal for couples, families, or groups of friends.

Of course, Sopron also boasts other excellent hotels, such as Pannonia Hotel in the city center or the cozy Hotel Wollner, which offer high standards but are more suited for short stays or business trips with less emphasis on nature. The Fagus Hotel Conference & Spa Sopron caters primarily to business visitors or wellness seekers, providing modern conference facilities and spa services.

Overall, for travelers eager to explore Sopron who seek relaxation, nature, and authentic historical experiences, staying at Hotel Szieszta offers the most complete experience of what the city’s hidden treasures have to offer.


Hotel Szieszta in Sopron, surrounded by greenery with panoramic views of Lövér hills.

Frequently Asked Questions (FAQ)

Why is the former fortress called the Cobblestone Castle?

The name „Cobblestone Castle” has several suggested origins. Some historical sources attribute it to the characteristic rectangular stones used in construction, while others look to local folklore for explanations. It’s possible that the distinctive, interlocking stones led to the nickname, thus perpetuating legends within Sopron’s stories.

Are the remains of the Cobblestone Castle visible today around Sopron?

Unfortunately, no standing walls or ruins of the Cobblestone Castle are visible in their original form today. However, at its suspected location—in the Hausbergen or Katzendorfer Dűlő areas—scattered archaeological finds and medieval architectural traces can be found. Tours, guided walks, and expert insights make the area accessible for exploration.

Do secret underground tunnels really exist beneath Sopron?

While there is documented evidence of medieval cellars, passageways, and underground chambers in the buildings of Sopron’s downtown, there is no archaeological proof of an extensive „secret city.” Still, local legends preserve many stories about these tunnels, suggesting that smaller passages, escape routes, and hidden rooms might have existed.

How can someone join a thematic historical tour following the footsteps of the Cobblestone Castle?

Several organizations in Sopron and nearby offer historical tours covering medieval castles, legends of the Cobblestone Castle, and underground passages. To find current programs and dates, visitors should check VisitSopron.com or inquire at the local Tourinform office.

What other attractions are worth exploring in Sopron?

Sopron is richly endowed with landmarks: the Fire Tower, Várkerület (Castle District), St. Michael’s Church, Fabricius House, and the medieval houses of the Jewish Street are all must-sees. The surrounding areas, including Lake Fertő and Fertőrákos, also offer excellent opportunities for hiking and outdoor activities.

Discover Sopron’s hidden gems and boldly venture into its history beneath the cobblestones! Embark on a journey that offers not only new knowledge but also unforgettable experiences. Sopron’s secret city and legendary tunnels await you on your next trip!

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