Stockholm, Sweden’s capital, spans nearly 800 years of history, evolving from a strategic 13th-century medieval fortress founded by Birger Jarl into a vibrant Scandinavian political, cultural, and commercial metropolis shaped by centuries of Nordic power struggles.
Let’s explore how the city evolved from its early beginnings into the vital capital that it is today. Along the way, we’ll highlight key events and significant historical landmarks (which you can visit) that have shaped Stockholm over the centuries.
When was Stockholm founded?
Stockholm was founded in 1252, when Birger Jarl built a fortress on the islands between Lake Mälaren and the Baltic Sea, where Gamla Stan stands today. These are the key moments since then, and where you can still see them.
| When | What happened | Where to see it today |
|---|---|---|
| 1252 | Birger Jarl founds a fortress between Lake Mälaren and the Baltic Sea | Gamla Stan, and Birger Jarl’s statue on Riddarholmen |
| From the 14th century | The fortress grows into the royal castle Tre Kronor | Museum Three Crowns, in the Royal Palace |
| 1397 | Denmark, Norway and Sweden are united in the Kalmar Union | — |
| 1471 | Sten Sture the Elder wins the Battle of Brunkeberg | Brunkebergstorg; the St George statue in Storkyrkan, and its bronze replica on Köpmantorget |
| 1520 | The Stockholm Bloodbath | Stortorget |
| 1523 | Gustav Vasa ends the union, and Sweden becomes an independent kingdom with Stockholm as its capital | — |
| 17th century | Sweden becomes a major European power, and Riddarhuset (the House of Nobility) is founded | Riddarhuset |
| 1697 | Fire destroys Tre Kronor | Museum Three Crowns |
| 18th century | The Royal Palace is built in its place | The Royal Palace |
| Early 20th century | City Hall is built | Stockholm City Hall |
Stockholm’s founding father
Stockholm’s origins trace back to 1252, when Birger Jarl, a powerful Swedish statesman, strategically founded a fortress on the small islands between Lake Mälaren and the Baltic Sea, in the location of today’s Gamla Stan district (The Old Town).
By placing this settlement at a major maritime crossroads, Stockholm was set to become a commercial hub linking trade networks in Northern Europe. Throughout the Middle Ages, the city grew around its island core – what is now Gamla Stan (the Old Town) – with its narrow alleys, medieval churches, and merchant houses.
Visit: Birger Jarl’s statue stands on Riddarholmen in Gamla Stan, a public square you can visit for free at any time.
The medieval castle Tre Kronor
Over time, this fortress evolved and expanded. By the late medieval period, it had grown into a royal stronghold known as Tre Kronor (“Three Crowns”), a name it carried at least from the 14th century onward. Tre Kronor became the primary royal residence and administrative center by the early modern period. This medieval castle stood until a catastrophic fire in 1697 destroyed it. In its place, the present-day Stockholm Royal Palace (Kungliga Slottet) was constructed in the 18th century.
Although the original Tre Kronor Castle was destroyed by fire and no longer exists, a miniature replica can be seen at the Museum Three Crowns, located on the ground floor of the Royal Palace’s northern wing in Stockholm.
Visit the Royal Palace and Museum Three Crowns: both are open daily 10:00–16:00 in October 2026, though the Royal Apartments sometimes close for state receptions. One ticket covers the Royal Apartments, the Treasury and Museum Three Crowns: in 2026 it costs 220 SEK for adults (240 SEK May–September), 200/220 SEK for students and 110/120 SEK for children aged 7–17, and children aged 6 and under go free. It’s a five-minute walk from Gamla stan metro station.
Address: Slottsbacken 1See on map
Friction in the union
In 1397, the three Nordic kingdoms – Denmark, Norway, and Sweden – were formally united under a single monarch at Kalmar, marking the start of the Kalmar Union. While the Union initially aimed to create stability, mutual defense, and unified foreign policy, it quickly became a source of tension. The Swedish nobility and merchant class often felt disadvantaged by Danish dominance within the Union’s leadership structures. Over time, these resentments bred friction and rebellion, as many prominent Swedes sought greater control over their own kingdom’s affairs.
The year 1471 saw a critical confrontation known as the Battle of Brunkeberg, fought at Brunkebergstorg square, in the Norrmalm district in central Stockholm. This battle pitted the Swedish regent Sten Sture the Elder and his supporters against forces loyal to King Christian I of Denmark, representing the Union. Sten Sture’s victory bolstered the Swedish drive for independence, elevating local leaders who opposed the Danish crown’s attempts at centralization. It also enhanced Stockholm’s role as a focal point of Swedish resistance and set a precedent for asserting local autonomy against external control. Sten Sture, victorious in the battle, commemorated his triumph with the creation of a wooden statue of St. George and the Dragon. This symbolic piece represents the struggle against external domination and is housed in Stockholm Cathedral, located in the Gamla Stan district. A bronze replica of the statue can also be found on Köpmantorget square.
Above: photo of the St. George and the Dragon statue located in Gamla Stan district (Google Maps link).
Visit: Brunkebergstorg and Köpmantorget, where the bronze St George stands, are public squares, free at any time. Storkyrkan (Stockholm Cathedral), home to the wooden St George, is at Trångsund 1 and is open 9:30–17:00 (9:00–18:00 from 1 June to 13 September). Entry in 2026 is 120 SEK, 90 SEK for seniors and free for under-18s, with an audio guide included. Large bags, backpacks and prams can’t be taken inside.
The Stockholm Bloodbath
A key turning point occurred in the early 16th century. Sweden was still part of the Kalmar Union, and Stockholm was still experiencing tensions between Swedish nobles and Danish rulers. These culminated in the Stockholm Bloodbath of 1520, when scores of Swedish aristocrats were executed under the orders of Denmark’s King Christian II. This event sparked nationalist outrage and led directly to the rise of Gustav Vasa, who in 1523 ended the union and established Sweden as an independent kingdom with Stockholm as its political and cultural capital.
Above is a photo of Stortorget Square, the site of the Stockholm Bloodbath. Today, it’s a popular destination—not for its dark past, but for its iconic colorful buildings, historic architecture, and cozy cafés where visitors love to soak up the sun on good-weather days.
Visit: Stortorget is a public square in Gamla Stan, free to visit at any time.
On the path towards modernity
During the 17th century, when Sweden briefly emerged as a major European power, Stockholm’s influence swelled. The city’s population grew, grand baroque buildings were constructed, and it became the administrative and royal center of the Swedish Empire. Many institutions founded in this era – such as the Riddarhuset (House of Nobility) – helped shape the cultural and intellectual life of the country.
Visit Riddarhuset: the palace opens to visitors for one hour, 11:00–12:00, on weekdays that aren’t public holidays, when you can walk through four of its rooms on your own, including the Riddarhussalen. Entry in 2026 is 60 SEK, 40 SEK for students and pensioners, and free for children up to 12. This autumn it’s closed on 30 October, on 11, 23 and 30 December and on 4–5 January. Guided group tours can be booked separately.
A modern city takes shape
As Sweden’s imperial ambitions waned in the 18th and early 19th centuries, Stockholm evolved into a modern European capital, undergoing infrastructural changes aligned with growing industrialization. By the late 19th century, improved shipping routes, railways, and evolving industries transformed Stockholm from a historical fortress town into a thriving economic and cultural metropolis. The introduction of modern city planning – seen in the expansion of suburbs and the creation of major parks – reflected a forward-thinking approach to urban design.
World War periods in the 20th century saw Sweden maintain neutrality, which allowed Stockholm to avoid war-time destruction and swiftly transition into a center for diplomacy, humanitarian initiatives, and innovation. Post-war developments emphasized social welfare, progressive housing policies, and environmental stewardship – principles that still guide the city’s planning and culture today.
Historical landmarks
Today, Stockholm’s historic landmarks serve both as tangible reminders of its past and as active participants in its cultural life. Gamla Stan preserves the medieval charm, while the Royal Palace and Stockholm Cathedral stand as symbols of centuries-old royal and ecclesiastical authority. The City Hall, built in the early 20th century, represents the city’s modern civic pride, regularly hosting Nobel Prize banquets. Meanwhile, museums like the Vasa Museum and Skansen open-air museum connect Stockholm’s residents and visitors with its maritime heritage, social transformations, and national traditions.
Visit City Hall: the halls are shown on guided tours. Our Stockholm City Hall guide has the tour times and prices.
Read more about historical landmarks in our article series: Stockholm’s iconic architecture
