The 1317 Nyköping Banquet ended with the two dukes, Erik and Valdemar, being thrown into the dungeon after being stripped of their power.
The castle was originally built as a defensive fortress in the late 12th century before being converted into a royal palace by King Birger.
During the 16th century, the fortress was significantly rebuilt and expanded into a Renaissance-style palace by Duke Karl.
A massive fire in 1665 caused the castle to fall into disrepair, leading to the use of its stones as building materials for other structures in the city.
The remaining main building serves as a venue for exhibitions focused on the history of the Södermanland region.
Excavations at the site have revealed evidence of a wooden palisade that predates the stone fortifications.
Nyköpingshus is a medieval fortress complex located on the Nyköping River, serving as both a strategic defensive structure and a royal residence throughout the Middle Ages. The site is best known as the location of the 1317 Nyköping Banquet, where King Birger Magnusson imprisoned his brothers in the castle dungeons. While much of the original masonry remains, the site serves as an open-air museum managed by Sörmlands Museum. Visitors can explore the remnants of the King's Hall and the surrounding castle grounds. The site frequently hosts historical reenactments and markets during the summer season. Archaeological excavations have uncovered extensive foundations dating back to the 12th century. The complex is situated at the mouth of the river, providing natural historical significance to the city of Nyköping.
The view of the castle walls from the river bridge looking toward the main tower.
Walk along the riverbanks surrounding the castle to view the foundation remains from different angles.
Check the Sörmlands Museum website for specific historical guided tours, as these are often limited to peak season.
Visit the adjacent Kungstorn (King’s Tower) which houses specific themed historical exhibits.
Assuming the entire complex is a complete, furnished castle; it is largely a collection of ruins and reconstructed foundations.
Grounds are generally accessible year-round, but specific museum exhibit buildings have seasonal operating patterns.
