Stop 14 of 50
1556–1563

Duke John’s Renaissance court at the castle

In 1556 the king’s eighteen-year-old son becomes Duke of Finland and turns Turku Castle into a Renaissance court. Seven years later his own brother’s army besieges it.

Renaissance · Reformation
The big story

Duke John’s Renaissance court at the castle

In 1556 King Gustav I made his son John, aged eighteen, Duke of Finland. For seven years Turku Castle was the seat of a Renaissance court, more splendid than anything Finland had seen. It ended with the castle besieged by an army sent by John’s own brother.

A duchy for the king’s son

  • The second son. John was born in 1537, the second son of Gustav I. His half-brother Eric, four years older, was heir to the throne Well documented.
  • Duke at eighteen. In 1556 Gustav made John Duke of Finland. The duchy covered Southwest Finland, Raseborg with western Uusimaa, and Lower Satakunta. John also governed the rest of Finland for the king Well documented.
  • Part of Sweden. Finland was not a separate country. The duchy gave John land, income and power, but it was still part of the Swedish realm Well documented.

A Renaissance court in Turku

  • What “Renaissance” means. The word means rebirth. From Italy a new style spread across Europe, inspired by ancient Rome and Greece. Princes showed their power with fine buildings, art, music and feasts Well documented.
  • A castle remodelled. John made Turku Castle his home and decorated it with a splendour never seen in Finland before. Nearly all the rooms of the old castle were remodelled. A new Renaissance floor was built with the King’s Hall and the Queen’s Hall Well documented.
  • Deer on Ruissalo. The island of Ruissalo became the duke’s hunting park. Red deer were brought there in 1562. The last record of a deer on the island is from 1599 Well documented.
  • Tournaments at Kupittaa. Knights’ tournaments and midsummer celebrations were held on the fields of Kupittaa, east of the town Well documented.
  • The high point. Court life at Turku Castle was never more splendid than in the late 1550s and early 1560s Well documented.

Brother against brother

  • A new king. Gustav I died in 1560, and Eric became King Eric XIV. He did not trust his brothers. In 1561 the Articles of Arboga limited the powers of the dukes Well documented.
  • A deal with Poland. Sweden and Poland were rivals for Livonia, today Estonia and Latvia. John lent the king of Poland 120,000 daler and took seven Livonian castles as security. In Eric’s eyes his brother was running his own foreign policy Well documented.
  • The wedding. On 4 October 1562 John married Catherine Jagiellon, the Polish king’s sister, in Vilnius, against Eric’s wishes (topic 2) Well documented.
  • Treason. In June 1563 the Estates in Stockholm found John guilty of treason. He was sentenced to lose his life, his property and his right to the throne. Eric sent an army to Finland Well documented.
  • The siege. The army is said to have numbered 10,000 men. John defended the castle with about 1,200. On 12 August 1563 he surrendered, in return for the promise of a prison fit for a prince Likely.
  • Punishment. John and Catherine were taken to Gripsholm Castle in Sweden. About 30 of John’s supporters were executed in Stockholm Well documented.
  • The wheel turns. The couple was released in 1567. In 1568 John and his younger brother Charles overthrew Eric, and John became King John III. Eric spent the rest of his life as a prisoner and died in 1577 Well documented.
How do we know?

The castle itself is evidence: John’s Renaissance floor is still there. Most dates come from royal letters and records studied by Swedish and Finnish historians. The size of Eric’s army is less certain. Some accounts give 10,000 men, which may be too high.

River AuraNTurkuCathedralKupittaaRuissaloTurku Castleto Vilnius and Livonia← from StockholmEric’s army1,200 mento Gripsholm
Step through the years, from the new duke in 1556 to the siege and the prison at Gripsholm.A simplified view, not to scale. Directions to Vilnius, Stockholm and Gripsholm are only arrows.
Why it matters

For a few years Turku was the centre of a princely court, and the Renaissance floor John built is still part of the castle. John’s Polish marriage also tied Sweden to Poland. Their son Sigismund would become king of both countries, and the quarrel over his throne led to the Club War in Finland (stop 15).

On the lighter side

Catherine Jagiellon: Polish princess in Turku

Just before Christmas 1562 a Polish princess arrived at Turku Castle with about sixty servants, 240 kilograms of silver and probably the first forks ever seen in Finland. Eight months later she followed her husband into prison.

A princess from Kraków

  • Born in Kraków. Catherine was born on 1 November 1526, the daughter of King Sigismund I of Poland and the Italian princess Bona Sforza Well documented.
  • An Italian education. Her mother brought Italian ways to the Polish court. Italian tutors taught her Latin, German and Italian, and she learned to ride, dance, sing and play instruments Well documented.
  • A political match. At 35 she was still unmarried. For John the marriage meant an alliance with Poland. For her brother, King Sigismund II Augustus, it came with a large loan for his war in Livonia Well documented.
  • A week of feasts. They married in the lower castle of Vilnius on 4 October 1562, in a Catholic ceremony. A week of parties and tournaments followed Well documented.

Eight months in Turku

  • Arrival. The couple reached Turku just before Christmas 1562. Nobody recorded which way they travelled Well documented.
  • A household of her own. About sixty people came with her: Polish nobles and ladies-in-waiting, servants, some Italians, two chaplains, a clerk and an apothecary Well documented.
  • Luggage fit for a queen. She brought tapestries, silk sheets, 30 yellow Turkish rugs, chandeliers, mirrors and 240 kilograms of silver tableware. Her wardrobe held hundreds of garments in satin, silk and velvet Well documented.
  • Forks. Among her things were gilded knives, forks and spoons. She probably brought the first forks to Finland and Sweden Likely.
  • Catholic in a Lutheran land. Catherine kept her Catholic faith all her life, with priests of her own Well documented.

Into prison, and onto the throne

  • A choice? When the castle fell in August 1563, Catherine was free to go back to Poland. One account says she chose to share John’s prison. Another says she was forced to go with him Debated.
  • “Nothing but death.” It is said that she showed the king’s man the words inside her ring: Nemo nisi mors, “nothing but death” shall part us Legend.
  • Gripsholm. For four years the couple lived in a tower room at Gripsholm Castle. Catherine could walk in the garden under guard. Their son Sigismund was born there in 1566 Well documented.
  • Queen. On 10 July 1569 Catherine was crowned Queen of Sweden. She died at Stockholm Castle on 16 September 1583 and was buried in Uppsala Cathedral Well documented.
  • Her son, two crowns. In 1587 Sigismund was elected King of Poland. In 1592 he also became King of Sweden Well documented.
Two versions of 1563

Swedish sources do not agree. The Biographical Dictionary of Swedish Women says Catherine was forced to follow John. Sweden’s Royal Palaces say she went of her own free will, and that her imprisonment was lighter for that reason. The ring story is told only as something “it is said”.

SwedenFinlandLivoniaLithuaniaPolandroute not recordedSigismund, 1587KrakówVilniusTurkuGripsholmStockholmUppsala
What came with her to Turku

Pick a thing to read about it.

Follow Catherine’s life around the Baltic, then open her luggage.Places are exact. The lines between them are not real routes.
Why it matters

Catherine stayed in Turku for less than a year, but she brought the manners of an Italian Renaissance court with her. Through her son Sigismund, a Catholic king of Lutheran Sweden, her marriage shaped the next forty years of Swedish and Finnish history.

Sources and further reading

  1. Turku Castle — official history: Duke John’s Renaissance court.
  2. Turku Castle — overview.
  3. Duchy of Finland — John’s duchy and its lands.
  4. John III of Sweden — duke, prisoner and king.
  5. Eric XIV of Sweden — John’s brother and enemy.
  6. History of Ruissalo (City of Turku): the duke’s red deer, 1562.
  7. History of Kupittaa Park (City of Turku): Duke John’s tournaments.
  8. Catherine Jagiellon — overview.
  9. Katarina Jagellonica — Svenskt kvinnobiografiskt lexikon (Biographical Dictionary of Swedish Women).
  10. Katarina Jagellonica — Svenskt biografiskt lexikon (in Swedish): her household.
  11. A courageous queen: Katarina Jagellonica (Royal Palaces of Sweden, 2020): her dowry, the forks and Gripsholm.
  12. Katarzyna Jagiellonka: Vilnius to Åbo (University of Oxford, Marrying Cultures project).
  13. Sigismund III Vasa — Catherine’s son, King of Poland and Sweden.

Spotted a mistake? Know more?

This site is open and free. Corrections and additions are welcome — every page lists its sources so you can check them.