🇨🇿 Czechia · Southern and northern Bohemia
Třeboň is one of those small jewels that sum up the quiet soul of South Bohemia. It is a walled historic town, with a long square of colourful houses, a Renaissance castle and the serene air of a spa. But what makes it unique is what surrounds it: hundreds of fish ponds shining among woods and meadows, a water landscape designed by human hands almost five centuries ago and still working exactly as it did then.
Those ponds — the rybníky — are not natural lakes but a colossal work of hydraulic engineering built mainly in the fifteenth and sixteenth centuries to raise carp. The largest of them all, the Rožmberk pond, is the biggest in Czechia and in central Europe, and much of the carp Czechs eat at Christmas, a national tradition, comes from here. Behind this system lies a legendary name: Jakub Krčín of Jelčany, the brilliant and hot-tempered engineer who, in the service of the lords of the Rose, the Rožmberks, tamed the rivers and created this world of water.
This guide covers Třeboň calmly: the historic centre and its castle, the Regent brewery that has been making beer since 1379, the walk around the Svět pond to the impressive Schwarzenberg mausoleum, the peat baths that heal tired bones and the walks and rides through the Biosphere Reserve. A perfect destination for slowing down, eating pond fish and understanding how human ingenuity can create a landscape that lasts for centuries.
Třeboň grew in the shadow of the Rožmberks (Rosenbergs), the most powerful family in southern Bohemia, the 'lords of the Rose', who made it one of their main residences. Its great epic is that of water: between the fifteenth and sixteenth centuries, engineers in the service of the Rožmberks turned a marshy plain into a giant system of fish ponds linked by canals. The most famous architect of it was Jakub Krčín of Jelčany, regent to the Rožmberks, who in the sixteenth century built the huge Rožmberk pond (1584-1590), the Nová řeka ('New River') and reworked the Golden Channel (Zlatá stoka), works that still regulate the waters and raise carp. With the death of Petr Vok, the last Rožmberk, at Třeboň in 1611, the estate passed through other hands until it reached the Schwarzenbergs, who held it for centuries and raised their monumental mausoleum here. The town also has an old brewery (1379) and, since the nineteenth century, a peat spa. The whole district is today a UNESCO Biosphere Reserve. The full history is on our history page.
Read the full history ↓From the ponds and castles of the Rožmberks in the south — Český Krumlov, České Budějovice, Třeboň — to the textile Sudetenland of Liberec and the sandstone canyons of Bohemian Switzerland in the north: the Bohemia of the great noble houses and of the borderlands.
Read the history of Southern and northern Bohemia →No exact prices: a scale from $ (budget) to $$$$$ (luxury), with 2-3 options per category.
Origins, formation and what the sources say.
To understand Třeboň you have to start with a family: the Rožmberks, Rosenberg in German, the 'lords of the Rose'. Descendants of the Vítkovci, they were for centuries the most powerful noble line in the whole of southern Bohemia, so rich and so influential that at times they rivalled the kings themselves. Their emblem, a red five-petalled rose, can still be seen across the region, from Český Krumlov to Třeboň.
The town appears in documents as early as the fourteenth century as a possession of this family, and it soon became one of their favourite residences. The Rožmberks turned a modest walled town into a centre of power: they built and enlarged the castle, turning it from a medieval fortress into an elegant Renaissance palace with arcaded courtyards and sgraffito, and they drew in craftsmen, merchants and administrators. Třeboň, protected by its walls, its monumental gates and a network of ponds that also served as a defence, was at once a seigneurial residence, a stronghold and an economic centre.
So this small town lived in the shadow of a cultivated and ambitious court. The last and perhaps most endearing of the Rožmberks, Petr Vok, moved his court and his famous library here in his final years, one of the largest book collections in the central Europe of his time. In the twilight of the lords of the Rose, Třeboň was the family's sentimental heart.
If the Rožmberks provided the power and the money, one man provided the genius: Jakub Krčín of Jelčany and Sedlčany (about 1535-1604), regent of the family's estates and one of the most brilliant hydraulic engineers of his age. Krčín is the great protagonist of the epic that made Třeboň famous: the creation, with dykes, canals and sluices, of a colossal system of fish ponds on a plain that had previously been marshy and battered by the floods of the river Lužnice.
The Třeboň basin already had ponds from the fifteenth century — at the beginning of the sixteenth, the engineer Štěpánek Netolický had laid out the Golden Channel (Zlatá stoka), an artificial artery more than forty kilometres long to feed them — but it was Krčín who took the system to its peak. In the second half of the sixteenth century he built or reworked dozens of ponds, among them the Svět, beside the town. His masterpiece was the Rožmberk pond, raised between 1584 and 1590: with almost five square kilometres of surface, it is still today the largest fish pond in Czechia and in central Europe. To regulate the waters of the Lužnice and stop it flooding the new pond, Krčín also built the Nová řeka ('New River'), an artificial canal that diverts part of the river's flow.
What is astonishing is that this sixteenth-century work is still functioning. The dykes, canals and sluices Krčín designed go on regulating the waters and raising fish more than four centuries later. Legend paints him as a brilliant, arrogant and feared man, almost a wizard of water, and his figure remained bound for ever to this landscape. The whole district is today a UNESCO Biosphere Reserve, and its value is not only natural but also that of one of the greatest works of engineering in pre-industrial Europe.
Those ponds were not built for beauty but for business. Fish farming — above all carp — was a very lucrative trade in medieval and early modern Europe, especially because of the enormous demand for fish imposed by the Catholic Church during Lent and the many fast days of the calendar, when meat could not be eaten. The Rožmberks turned their ponds into a machine for generating income, and the carp of Třeboň reached tables all over Bohemia and beyond.
The pond system worked (and works) with precise logic: the fish are raised over several years, moving from one pond to another according to their size, and in autumn comes the great moment, the výlov. The ponds are partly drained and the fishermen, with enormous nets and flat-bottomed boats, gather tonnes of carp from the mud and cold water. In 1607 a catch of more than 200 tonnes was recorded; the Thirty Years' War, by contrast, sank production for a time.
This tradition is still very much alive and has become a national symbol. Christmas carp is the centrepiece of Christmas Eve dinner for the vast majority of Czech families — it is estimated that around 80-90 % serve it — and much of that carp comes precisely from the ponds of Třeboň, with the Rožmberk at their head. Every autumn the výlovy draw crowds who come to watch the spectacle, buy fresh fish and eat fried fish and fish soup at the stalls beside the water. Few places show so clearly how a piece of sixteenth-century engineering still shapes the life and the table of a whole country.
The great age of the lords of the Rose came to an end in Třeboň. Petr Vok of Rožmberk, the last male of the family, spent his final years here, absorbed in his books and in administering his shrinking estates, and died at Třeboň castle in 1611. With him one of the most important lines in Czech history died out. His extremely valuable library and his archives remained partly tied to the town, which still holds one of the most important historical archives in the country.
The estate then passed to the Švamberk (Schwamberg) family, related to the Rožmberks. But these were turbulent times: when the revolt of the Protestant estates of Bohemia against the Habsburgs broke out, the Švamberks sided with the rebels. The defeat of the revolt at the battle of White Mountain in 1620 had very harsh consequences: their property was confiscated by the crown, and Třeboň changed hands. After several decades and various owners, the estate ended up in 1660 in the hands of the Schwarzenbergs, another great noble family of German origin that would become one of the richest and most powerful in the empire.
The Schwarzenbergs made Třeboň one of their seats for centuries, and at the end of the nineteenth century even their winter residence. Their most impressive mark is the family mausoleum they raised between 1874 and 1877 on the shore of the Svět pond, at Domanín: an elegant hexagonal neo-Gothic tomb, surrounded by an English-style park, driven by Princess Eleonora of Schwarzenberg and her husband Jan Adolf II. In its crypt, partly below the water level of the pond, rest a good twenty members of the family. The mausoleum, returned to the family's descendants in recent times, is today one of the town's most singular monuments.
Alongside water and nobility, Třeboň cultivated two other traditions that still define it: beer and the spa. The town boasts a brewery founded in 1379, in the time of the Rožmberks, today known for its Bohemia Regent brand: it is one of the oldest breweries in the world still in operation, and its name recalls the post of regent who administered the seigneurial estates. Brewing beer was for centuries a privilege and a source of wealth for the town, and you can still visit the works and taste its beers, including on evening tours by candlelight.
The other great tradition was born in the nineteenth century and is more unexpected: the peat baths. The Třeboň district, with its bogs, is rich in medicinal peat (rašelina), and in 1883 a local man, Václav Hucek, opened a spa establishment — the Bertiny lázně, 'Berta's Baths' — to use its properties in treating conditions of the bones and joints. That historic spa was later joined by the modern Lázně Aurora, beside the Svět pond, and Třeboň established itself as one of the best-loved spa towns in Czechia, where people still come to sink into the warm dark mud to ease rheumatism and back pain.
The twentieth century brought Třeboň, as it did the whole country, the First World War and the birth of Czechoslovakia in 1918, the Second World War, the expropriation of the Schwarzenbergs and the communist regime, which nationalised the ponds, the castle and the spa. After the Velvet Revolution of 1989, the town restored its heritage and built up nature and health tourism. In 1977 the whole district had already been declared a UNESCO Biosphere Reserve. Today Třeboň is a quiet and very Czech break: a pocket-sized town among ponds, with a castle, centuries-old beer and peat baths, where the greatest luxury is walking slowly around the water that a Renaissance engineer imagined almost five hundred years ago.