The Dark Secret of Rudolf II: How the Emperor’s Son Became a Murderer
Prague Castle has witnessed centuries of royal intrigues, betrayals and family scandals. But few stories connected to its history are as disturbing as that of Don Julius Caesar d’Austria, the eldest son of Emperor Rudolf II.
Born into one of Europe’s most powerful dynasties, Julius could have enjoyed a privileged life at the Habsburg court. His father had ambitious plans for him, possibly even imagining him as the ruler of a principality.
Instead, Julius became responsible for one of the most horrifying murders in Czech royal history.
His victim was a young woman named Markéta Pichlerová. The crime took place in 1608 at Český Krumlov Castle, and its brutality shocked contemporaries.
What makes this story particularly fascinating is that it begins in Renaissance Prague, during the reign of an emperor remembered for his fascination with art, astronomy, alchemy and the mysteries of the universe.
Rudolf II: The Emperor Who Never Married
Emperor Rudolf II ruled the Holy Roman Empire from Prague, transforming the city into one of Europe's most remarkable cultural and intellectual centres.
His court attracted astronomers such as Tycho Brahe and Johannes Kepler, artists from across Europe, collectors of extraordinary objects and people claiming to possess the secrets of alchemy.
Yet despite his imperial status, Rudolf never married.
This created a serious problem for the Habsburg dynasty. Without a legitimate son, the emperor had no direct heir who could inherit his titles in the usual way.
However, Rudolf was not childless.
He had several children outside marriage. Their mother is traditionally identified as Katharina Strada, the daughter of the imperial antiquarian Jacopo Strada, although aspects of their parentage remain disputed.
His eldest son was Don Julius Caesar d’Austria, born around 1584–1586, probably in Prague.
Although Julius was illegitimate, he was not entirely excluded from his father's world. Rudolf arranged for his education and considered ways to provide him with a distinguished position.
According to reports from diplomats at the imperial court, there was even discussion of Julius becoming Prince of Transylvania.
For a young man born outside marriage, this would have been an extraordinary achievement.
But his life was heading in a very different direction.
A Troubled Prince at the Imperial Court
From a young age, Julius reportedly displayed increasingly disturbing behaviour.
Historical accounts describe unpredictable outbursts, aggression and episodes in which he appeared to lose control of his actions.
Some modern accounts have retrospectively described him as suffering from schizophrenia. However, diagnosing someone who lived more than four centuries ago is highly uncertain, and the precise nature of his condition remains unknown.
What is much clearer is that his behaviour became dangerous.
According to historical accounts, in 1606 Julius killed a servant and was sent to a monastery in Gaming, Austria.
His father was now faced with a difficult problem. Julius was a member of the imperial family, but his conduct threatened both those around him and the dynasty's reputation.
Eventually, the emperor arranged for him to live in Český Krumlov, a magnificent castle town in southern Bohemia.
Rudolf had acquired the Český Krumlov estate from Peter Vok of Rosenberg in 1601. Julius first arrived there in 1605 and subsequently spent much of his final years in the town.
The move was intended to give the emperor's son a suitable residence away from the political centre of Prague.
Instead, it became the setting for a tragedy.
The Young Woman Who Caught the Prince's Attention
Around 1607, Julius became involved with a young woman named Markéta Pichlerová.
She was the daughter of Zikmund Pichler, according to the Český Krumlov castle history, although some other historical records give her father's name as Šimon. Her family operated a bathhouse in Český Krumlov.
Markéta was not a noblewoman. She belonged to a completely different social world from the emperor's son.
Yet Julius wanted her to stay with him at the castle.
For Markéta's family, refusing the wishes of an imperial prince would have been extremely difficult. The imbalance of power between the two families was enormous.
Julius soon became violent.
During one particularly terrifying episode, he attacked Markéta, beating and stabbing her before throwing her from a castle window.
Remarkably, she survived.
The Rosenberg chronicler Václav Březan described how her fall was broken by a pile of rubbish beneath the window.
Badly injured, Markéta was eventually able to recover.
She had escaped with her life.
Unfortunately, her ordeal was far from over.
The Bloody Carnival of 1608
After surviving the attack, Markéta stayed away from Julius.
But the emperor's son demanded her return.
According to historical accounts, Julius had Markéta's father imprisoned for five weeks and threatened to have him hanged unless his daughter returned to the castle.
Faced with this terrifying pressure, her mother eventually agreed to bring Markéta back.
What happened next became one of the darkest episodes in the history of Český Krumlov.
On 18 February 1608, according to the contemporary chronicler Václav Březan, Julius murdered Markéta during the Carnival celebrations.
Contemporary and later accounts describe an exceptionally brutal killing, during which her body was mutilated and dismembered.
Some accounts state that Julius subsequently arranged for a coffin to be made for his victim.
The murder became notorious, and the story spread far beyond the castle walls.
For the people of Český Krumlov, the crime was particularly shocking because its perpetrator was not an ordinary criminal.
He was the son of the emperor.
How Did Emperor Rudolf II React?
News of the murder eventually reached Rudolf II in Prague.
The emperor had spent years trying to secure a future for his eldest son. Now Julius had become responsible for a crime that could not easily be concealed.
Rudolf ordered that Julius be confined.
The emperor's son was effectively imprisoned at Český Krumlov Castle, where he was kept under strict supervision.
Accounts of his final months describe increasingly erratic behaviour. He reportedly shouted, destroyed furniture, neglected his personal hygiene and frightened the servants responsible for looking after him.
The privileged prince who might once have dreamed of political power was now a prisoner inside his own residence.
On 25 June 1609, Julius died, still in his twenties.
Contemporary accounts attributed his death to complications from a severe abscess or infection in his throat, although the precise medical cause cannot be established with certainty.
He was buried at the Minorite monastery in Český Krumlov, but the exact location of his grave is unknown.
His burial was apparently intended to be temporary, with plans to move his remains to a more prestigious location. However, this seemingly never happened.
He had outlived Markéta by little more than a year.
What Happened to Markéta's Family?
One of the most disturbing aspects of this story is what happened to the victim's family.
Markéta's parents had already endured the murder of their daughter. Yet historical records indicate that some townspeople blamed her mother for the tragedy and wanted the family to leave Český Krumlov.
The Bohemian Chamber in Prague did not support forcing them out, and the Pichlers were allowed to continue operating their bathhouse.
Their former home is still associated with the tragedy.
The building at Latrán No. 1 in Český Krumlov was once the Pichler family's bathhouse. Its history preserves a rare connection to the ordinary people whose lives were affected by the actions of the imperial household.
While the name of Julius survived because of his royal blood, Markéta deserves to be remembered as more than a character in the story of a troubled prince.
She was a young woman whose life was destroyed by a man who possessed far more power than she did.
A Darker Side of Rudolf II's Golden Age
When we think about Rudolf II's Prague, we usually imagine a fascinating Renaissance city filled with artists, astronomers and alchemists.
And rightly so.
Under Rudolf, Prague became one of Europe's most important centres of science and culture. His collections at Prague Castle were legendary, and his patronage helped create an extraordinary intellectual environment.
But the story of Don Julius reveals a very different side of the imperial court.
It was a world in which noble birth could provide extraordinary privileges, even to people whose actions endangered others.
It also reminds us that the personal lives of rulers could be deeply troubled, regardless of their wealth, status or political power.
Rudolf himself died in Prague in 1612, just three years after his son. He never had a legitimate heir, and his brother Matthias succeeded him as emperor.
The great Renaissance court that Rudolf had assembled gradually disappeared, but its stories continued to shape Prague's historical identity.
Among them is the tragic fate of his eldest son.
Discover Rudolf II's Prague Today
Although the murder took place in Český Krumlov, the story has a strong connection to Prague.
Rudolf II spent much of his reign at Prague Castle, where he assembled his famous collections and surrounded himself with some of the most brilliant minds of the Renaissance.
His court helped make Prague a city of science, art and extraordinary stories.
Today, visitors can still explore the places associated with the emperor's reign, including Prague Castle and the historic streets of the Lesser Town.
For those interested in the darker chapters of Czech history, Český Krumlov is also worth visiting. Its magnificent castle preserves the setting of the tragedy that brought Don Julius Caesar d’Austria's life to its terrible conclusion.
And next time you walk through Prague Castle, remember that behind the magnificent architecture and imperial grandeur were real people whose lives were often far more complicated – and sometimes far darker – than the history books first suggest.
Discover more fascinating stories about Prague's rulers, legends and hidden history on our blog.