Willem Boy
Willem Boy (Guillaume Boyen; 1520 – 1592) was a Flemish painter, sculptor, and architect active in Sweden from around 1558 until his death. Few of Boy's works have survived, and he is mainly remembered for the sarcophagus of King Gustav I in the Uppsala Cathedral.
Also recorded as Guillaume Boyen · Willem Boyens · Willem Boyens (ca. 1520–1592)
Willem Boy

Willem Boy (1520-1592) · This image comes from the Southerly Clubs of Stockholm, Sweden, a non-profit society which owns image publication rights to the archives of Lars Jacob Prod, Mimical Productions, F.U.S.I.A., Swenglisti · Public domain
- Name
- Willem Boy
- Born
- 1520
- Birthplace
- Mechelen, County of Flanders, Habsburg Netherlands
- Died
- 1592
- Place of death
- Stockholm, Sweden
- Known for
- * Sculpture
- Movement
- Northern Renaissance
- Nationality
- Sweden · Netherlands · Southern Netherlands
- Occupation
- architect · painter · sculptor · medalist
- Languages
- Dutch
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Documentary summary
Willem Boy (Guillaume Boyen; 1520 – 1592) was a Flemish painter, sculptor, and architect active in Sweden from around 1558 until his death. Few of Boy's works have survived, and he is mainly remembered for the sarcophagus of King Gustav I in the Uppsala Cathedral.
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Note VALÉORINE
Willem Boy (1520–1592) was an architect, medalist and painter, among other activities and a national of the Netherlands and Southern Netherlands. Born in Mechelen, the architect died in Stockholm.
Languages used include Dutch. Works by Willem Boy are held at National Portrait Gallery of Sweden and Nationalmuseum.
Composed from admitted, traceable facts · 26 September 2026
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In this article
Key facts
Key facts
• Name — Willem Boy • Born — 1520 • Birthplace — Mechelen, County of Flanders, Habsburg Netherlands • Died — 1592 • Place of death — Stockholm, Sweden • Other Names — Guillaume Boyen • Known for — * Sculpture • Architecture • Painting • Notable Works — * Tomb of Gustav I of Sweden • Riddarholmen Church spire • Three Crowns Castle • Svartsjö Palace • Drottningholm Palace • Movement — Northern Renaissance • Patron — Gustav I of Sweden, John III of Sweden • Illustration — Tomb of Gustav I and two of his consorts at Uppsala Cathedral
Early life
Early life
He is believed to have originated from Mechelen and to have arrived in Sweden no later than 1558 during the late reign of Gustav Vasa to work as a painter of portraits. Within a few years, he became one of the country's leading artists, whose talents proved helpful in a wide range of fields; for example, he led the construction of the fortification at Vaxholm in 1589. Even though few of his works have survived, his influence on Swedish culture was considerable.
Sarcophagi
Sarcophagi
• Illustration — Front of the Vasa sarcophagus • Illustration — Queen Catherine Jagellon's grave at Uppsala Boy is thought to have soon returned to Flanders to spend six years working on the sarcophagus of Gustav Vasa and his two first consorts Catherine and Margaret. In 1571, he was finally able to send the statues of the king and his wives to Sweden. In 1572, he went to England to buy marble and alabaster for the rest of the monument. However, in 1567 he had borrowed 1.000 daler for the project and when the bond proprietor in Antwerp was informed the statues happened to be in the city, she presented the bonds to the city magistrates and, as the defendant failed to present himself, the statues were confiscated. When Boy was informed of the situation, he immediately had the repayment postponed and wrote a letter to the Swedish monarch, who happened to be in Kalmar. The infuriated king wrote a letter to the Duke of Alba to have the monument sent to Sweden. Furthermore, to ensure Dutch merchants in Sweden would support his cause, he threatened to deprive them of their favoured position and demanded that they provide security at least equal to the value of the monument. The Dutch magistrates eventually backed down, and Boy was given a respite. The sarcophagus was safely delivered to Uppsala in 1583. The main volume in red marble measures 2.77×2×1.36 m with pillars on the corners 1.68 m tall. The statues are made of white marble with crowns and sceptres in gilded bronze. In 1584, he worked on the grave monument of Catherine Jagellon, a monument crowned by a marble vault carried by pillars in front of which rests the queen on her sarcophagus.
Stockholm
Stockholm
While Boy was abroad, Eric had devoted himself to various architectonic projects; he had the Franciscan monastery in Stockholm (today Riddarholmskyrkan) rebuilt; he appointed Arendt de Roy to repair and enlarge Vadstena Castle; and he employed the Paar brothers at the Castles in Uppsala and Kalmar. However, the king's main undertaking was undoubtedly the castle in Stockholm, where Boy was to spend the remaining 16 years of his life. The king had employed an artist called Anders Målare to oversee the works at the castles in Stockholm and Svartsjö, but in letters in 1573, the king complained that Målare had failed to fulfill his duties due to age and poor health. Having no one else to choose from, he appointed his chamberlain, Phillipe Kern, to replace the Swedish artist. Kern, however, proved to be untrustworthy and, within a few years, had provided himself with sufficient materials to build his private house. To hide his deed, Kern added the names of his subordinates to the material specifications, and Boy's name appears among them. This situation did not last, however, and in a letter of 25 June 1576 the king mentions Boy as the man leading the works, and on 10 July Boy is addressed "Master Wilhelm, architect at the Stockholm Palace". • Illustration — Courtyard of the Three Crown Castle with the royal church on the left As neither the castle nor any associated drawings by architects involved have survived, it is difficult to know what Boy's contribution to the structure was. However, surviving financial documents and letters written by the king while he resided elsewhere offer some hints. During his work on the castle in Stockholm, Boy had to supervise hundreds of employees, ensure materials were delivered in the proper order, and keep his demanding king happy. In 1577, repairs on the royal suite were completed. Two years later, stairs were built south of the castle while the northern gate was furnished with a tower adorned with a spire and a stone tablet carrying the royal coat of arms. Over subsequent years, he was involved in various undertakings at the palace, both decorative work and engineering. From 1586, Boy focused on the royal church and the decoration of the castle's large square-shaped room. The church was 130 feet long and located on the northern side of the courtyard. It was topped by a bell tower on which Boy worked in 1589. In 1591, glass and lead were bought for the windows. The king ordered lavish decorations for the square room, including a ceiling in gilded copper for which the gilding alone cost the equivalent of 100 ship pounds (170.000 kg) of copper, which failed to satisfy the king, who sent 30 Hungarian gold florins in 1589 to have a large sphere gilded. Boy spent the last years of his life producing sketches for various other projects in the palace, including gilded cornices in the dining room, ashlars for the so-called "Summer Room" and for the two towers flanking the eastern gate, and he had the spires of the three crown tower raised by 20–30 feet.
Svartsjö
Svartsjö
• Illustration — Svartsjö Palace. Engraving from Antiqua et hodierna. A monastery built by Lake Mälaren in the 15th century was made royal property by King Gustav I and, under his sons Eric and John, it was transformed into the Svartsjö Palace. The responsible architects were those working at the royal palace in Stockholm. The main building was a large cube crowned by a cupola and small towers with a round court surrounded by arcades in two stories in front. While it is difficult to determine which parts Boy was responsible for, he was working on the cupola and the towers in 1579; a correspondence between him and the king mentions the completion of the roof; and in 1586 the royal domains and a chapel near the palace were completed; and two years later the surrounding land was arranged in accordance with Boy's plans. However, when the king paid a visit to the palace in 1591, he was not pleased; construction on the palace in Stockholm had kept Boy busy, and the palace at Svartsjö had been neglected and remained uncompleted at the time of the architect's death. The palace was destroyed by fire a century later, a fate shared with most of his works, which seems to confirm that Boy was apparently not an architect in the proper sense.
Drottningholm
Drottningholm
• Illustration — The Gävle Palace was probably built to Boy's plans 1583-93, and most likely John III's palace at Drottningholm was similar. Detail from an engraving in Antiqua et Hodierna. Starting in 1576, Boy led the construction of the palace that preceded the extant Baroque version of the Drottningholm Palace. The royal mansion named Torvesund on the location was rebuilt into a palace by King John III, who was able to take a few rooms into possession in 1580, and the construction seems to have been completed four years later, save for the adornment of the interior. The centre of this rectangular Renaissance palace was the vaulted palace church, with surrounding rooms connected by open arcades and loggias. The choirs of the church possibly had ogive and rose windows like those at Vadstena Castle. Characteristic of the palaces built during this era were towers and pinnacles with adorned hoods, bay windows, arcades, and galleries and these were probably also prominent features of the Renaissance palace at Drottningholm. John named the palace after Queen Catherine Jagellon, which indicates it was never important as a military bastion. While the palace and its chapel were of great importance to the queen, it remained unfinished at the time of her death. An important prototype for the palace was the Wawel Castle in Kraków, and as at Drottningholm, palaces with church gables projecting out of the façades were built throughout Catholic Poland, and a similar scheme was used in Sweden at Borgholm, at the Vadstena Castle, and at the Uppsala Castle, the enlargement of which was also led by Boy. Drottningholm became an important centre for Counter-Reformation groups while plague tormented Stockholm in 1579. It eventually burned down in 1661, but even before that, the Catholic appearance of the palace must have caused it to be neglected and uncompleted. It was passed back and forth between various nobles and gradually decayed before an inventory around 1640 described it as a ruin with broken windows.
Churches
Churches
• Illustration — Riddarholmskyrkan as presented in Suecia Antiqua et Hodierna, 1690-1700 In 1581, the king ordered the city to build a tall, beautiful spire for Riddarholmen Church. As the proposal delivered by the magistrate failed to impress the king, he turned to his favourite architect in 1584, and Boy finally had a proposal ready by 1589, which pleased the king. The simple, narrow spire lasted until it was struck by lightning in 1835. King Eric also ordered two other churches to be constructed in the capital: one dedicated to St Henry and the other to the Holy Trinity. From contemporary accounts, it is known that the first was bought and used by the Finnish and German parishes in 1593. In a letter dated 1584, Boy is said to have led the construction of St Thomas, and in a letter dated 1588, the king orders Boy to decorate the western gable and add a tall spire without replacing the old one. The foundation for the Trinity was laid in 1589 according to the plans of Boy, but by the king's death in 1592, construction had stopped, with the walls reaching only 6 feet above ground. St Thomas was rebuilt and enlarged in the 17th century and still exists: Charles IX handed it over to the German parish, which renamed it St Gertrude. Additionally, Boy is believed to be responsible for the design of John III's Renaissance reconstruction of St James's church in Stockholm, built around 1520–1592 and featuring a central nave flanked by two tall aisles resting on sandstone columns.
Portraits
Portraits
The alabaster monument of Princess Isabella (1564–1566), daughter of John III, is in Strängnäs Cathedral. Two portraits of Gustav Vasa are assumed to have been made by him: a wooden relief and possibly a watercolour, both found at Gripsholm Castle. See also Vasa sarcophagi above.
Payment
Payment
His initial salary was 200 daler silver coins, a court dress, and emoluments in kind. On 28 February 1562, Boy travelled to Antwerp, and in 1565 he arrived in Stockholm where King John III appointed him a salary of 1.600 marks silver coins annually and emoluments in kind (corn, hops, a court dress, and lodging). In 1577 he received 200 daler, 144 hectoliters of corn, one court dress, 10 pounds of hop, 1 barrel of salt, 1 barrel of butter, three oxen, eight sheep, six pigs, 2 barrels of salmon, 1 barrel of cod, 10 pounds of pike, 1 barrel of herring, and fodder for a horse – in total worth 399½ daler.
Work
Work
• Three Crown Castle, Stockholm • Gävle Castle, completed in 1597. • Monument of Gustav Vasa at the Uppsala Cathedral. • Svartsjö Palace. • Saint James's church, Stockholm, 1580-93. • Drottningholm Palace • Uppsala Castle
Identity and overview
Identity and overview
The following is established of the heading itself.

Princess Elizabeth “Isabella” of Sweden as depicted on the sarcophagus of her grave sculpted by Willem Boy about 1570
Jacob Truedson Demitz for Ristesson · This image comes from the Southerly Clubs of Stockholm, Sweden, a non-profit society which owns image publication rights to the archives of Lars Jacob Prod, Mimical Productions, F.U.S.I.A., Swenglisti
Burial of Gustavus I, 1560, Sweden, perhaps by Willem Boy - National Museum of Finland - DSC04073
Daderot
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Named by the record
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Mechelen.
Birth place
Stockholm.
Death place
Primary material
Documents and archives
Institutional database
- Wikidata, structured authority record Q5584072: Willem Boy
Scholarly · Wikimedia Foundation
reference work
- “Willem Boy”, English Wikipedia, consulted as further reading
Reputable secondary · Wikipedia
Notes from the source article
Cited by Wikipedia
Notes from the source article
These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.Nordisk Familjebok
- 2.Sandén
- 3.Bedoire, pp 13-14.
- 4.S:t Jacobs kyrkas historia
- 5.One daler was initially worth 3–4 German marks but its value sank to 24 marks during the reigns of John III and Eric XIV.
References
Citations
References
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Institutional database
Wikidata, structured authority record Q5584072: Willem BoyWikimedia Foundation
Institutional witnessreference work
Secondary witness
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This entry is compiled from 7 catalogued sources across 3 independent registers. The registers consulted are Crossref registry, Wikimedia Foundation and Wikipedia. Every statement above is held against the register that stated it; where the registers are silent, the entry is silent.
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 17 August 2026.
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