Brno Ossuary: How It Was Found, Whose Bones They Are and How to Visit

St. James's Church stands in the historic centre of Brno, and for most of its history it was surrounded by its own cemetery, inside the city walls. That cemetery was in use from the early 13th century (City of Brno).

A churchyard in a walled town has a simple problem: the town keeps growing, and the ground does not. Brno solved it the way many European towns did. Graves were reopened after roughly 10 to 12 years, and the earlier remains were carried down into underground chambers so the plot could take a new burial (TIC BRNO). Repeat that for more than five centuries in a busy city and the chambers fill with the bones of generations of neighbours. The City of Brno also records that the cemetery saw heavy use during epidemics, when the need for space came faster.

The system ended with a change in law. In 1784 the Josephine reforms ended burials in churchyards for health reasons. The St. James cemetery was cleared, its wall was removed, and the ossuary beneath it gradually disappeared from public memory (TIC BRNO). The square kept its name and its church, while the people under it were largely forgotten above ground.

The people in the ossuary are mostly ordinary residents of Brno. The City of Brno describes the remains as those of adults and children, along with some animal remains, and says they are primarily people buried in the St. James churchyard and moved underground when graves were reused (City of Brno). Together they are the population of a city across more than five centuries.

Some of them died in the hardest years the city lived through. Official CzechTourism material says anthropological analyses associate some of the remains with plague and cholera epidemics, the Thirty Years' War and the Swedish siege of Brno (CzechTourism). That is an interpretation by anthropologists about parts of the collection, not a record that names how each person died. Most of the people here are anonymous, and the ossuary is a memorial to them as a community rather than as individuals.

It also helps to be clear about the famous number. The figure of more than 50,000 is an estimate of people, not a count of bones. Masaryk University researchers were able to examine only a sample of the collection, so nobody has an inventory of individual bones, and the accurate phrasing is "the remains of more than 50,000 people" (Masaryk University). If you want to know what anthropologists can read from a sample like this, our story on what bones tell archaeologists walks through it. For the wider history of plague burials in Europe, see our story on Black Death mass graves.

The ossuary came back into view because of planned works on the square. In 2001, Brno authorities commissioned archaeological research in Jakubské náměstí before structural changes were made to it. The survey showed that the old cemetery beneath the square connected with a large crypt and ossuary beneath St. James's Church (TIC BRNO).

It was not a complete surprise. Parts of the site had been known, but its full extent, and the estimated number of people whose remains were there, became clear only through this work. Aleš Svoboda, speaking to Radio Prague, described the research, the old system of reusing graves and the way the cemetery joined the church crypt. The Czech heritage project record for the later reconstruction gives the same estimate of about 50,000 people (EEA Grants project record).

Finding the chambers was one thing; making them safe to visit and stable enough to last was another. The research and conservation connected with the public opening took place in 2011 and 2012. During that time, Masaryk University researchers examined an eight-cubic-metre sample of skeletal remains in 14 days of fieldwork, because the entire collection could not be examined under the technical conditions available underground (Masaryk University).

The restoration had to deal with dampness, mould, structural stability, access and ventilation. Bones were removed where necessary, cleaned or conserved, and returned with attention both to airflow and to reverence for the dead. The City of Brno says the remains now on display are the best-preserved material. Damaged bone fragments, soil and bone dust were not thrown away; they were reburied at Brno Central Cemetery (City of Brno). The contractors named by the city were IMOS and FIRESTA (City of Brno reconstruction report).

On cost, the city's own figures differ. Its opening announcement reported construction costs of 33 million CZK, while a later city report gives 27 million CZK for the reconstruction. Both numbers come from the City of Brno. The reconstruction was supported by the city and by European regional funding, and the ossuary opened to the public on 22 June 2012.

The public route starts at a newly created entrance from Jakubské náměstí, so you go down from the square itself. Below, there are three historical chambers, along with lighting, information panels, artworks and a Chapel of the Dead (City of Brno).

One chamber matters more than the rest for understanding what the place was. It was conserved in its original layered arrangement, the form associated with the way remains were stored when graves were cleared, so it shows how the old ossuary chambers held the dead. That is the main difference between Brno and the famous decorated bone chapels elsewhere in Europe. Nobody built chandeliers or coats of arms out of these bones. What you see is the scale of a city's dead, stacked carefully in the dark, with a chapel set aside for remembering them.

The ossuary is open to visitors and run by TIC BRNO, Brno's tourist information centre. The details below are as shown on the official TIC BRNO page on 18 October 2026 (TIC BRNO). Hours and prices can change, so confirm them on that page before you go.

• Address: Jakubské náměstí, 658 78 Brno.
• Open Tuesday to Sunday, 9:30 to 18:00, with last entry at 17:30.
• Tickets can be bought online or at the door.
• Groups of six or more must reserve at kostnice@ticbrno.cz.
• Contact: kostnice@ticbrno.cz, +420 725 518 113.

Ask TIC BRNO about photography before your visit. It is also worth remembering what the place is. These are the remains of real people, the ancestors of families who may still live in Brno, and the ossuary is a place of remembrance. Quiet voices and a little patience in the narrow chambers suit it.

Most people who know one Czech ossuary know Sedlec, near Kutná Hora, so the comparison comes up often. Sedlec is the lower chapel of the Cemetery Church of All Saints and holds the remains of medieval inhabitants of Kutná Hora and its surroundings. Its official history describes a large cemetery, the storage of exhumed remains in the lower chapel, a restoration by Jan Santini-Aichel in the early 18th century, and a major bone decoration by František Rint, completed in 1870 (Sedlec Ossuary). Our story on the Sedlec Ossuary tells it in full.

The two places feel different. Sedlec is known for deliberate arrangements, including a bone chandelier and the Schwarzenberg coat of arms. Brno's significance lies in the scale of a former urban cemetery and the preserved arrangement of its underground chambers (CzechTourism). CzechTourism also names other Czech ossuaries worth knowing about.

Ossuaries like these exist across Europe, among them the Hallstatt bone house, the Czermna skull chapel and the Capuchin Crypt. Our overview of ossuaries around the world puts Brno among them.

These are the questions people ask most about the ossuary, answered briefly.

The Brno ossuary is a city's own memory, kept underground. For five centuries the people of Brno buried their dead around St. James's Church, made room for new graves by moving the old remains below, and then, after 1784, stopped and forgot. The 2001 survey brought those people back into view, and the restoration that followed treated them as what they are: Brno's ancestors, cleaned, steadied and set back in place, with the damaged remains reburied at the Central Cemetery. If you go, check the hours with TIC BRNO, take the stairs down from the square, and give the layered chamber a long, quiet look.

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