Sweden · Ruin
Stegeborg Castle
Stegeborg Castle is a medieval and Renaissance-era island fortress in St Anna parish, Söderköping, Östergötland, Sweden, built on an islet in a narrow sound of the Slätbaken bay. Originating with a 13th-century square brick tower, it was expanded with curtain walls, a western round tower and a north-wing castle church and was worked on through the late 16th century under John III. Much of the superstructure was demolished in the 18th century; substantial masonry and the round tower survive as ruins.
Its prime
1590
Today
Ruin
As it stood in 1590
The shape it held in its prime.
At its prime the castle sits compactly on a small, tree-covered islet in a narrow sound: a low, irregular stone curtain wall runs close to the shoreline, linking a tall cylindrical stone round tower on the western flank with an older, square brick tower at the southeast corner. A north wing containing the castle church projects from the wall; the base is made of large masonry with grassy slopes down to the water and timber pilings in the channel.
Its story
The story of Stegeborg Castle.
Stegeborg Castle occupies an island in a narrow sound at the bay of Slätbaken in Östergötland, on the water approach to Söderköping. It began with a 13th-century square brick tower; a simple fortified residence was added in the 14th century, expanded with a wall and a round tower to the west. By 1305 at the latest the bishop's farm here had been sold to King Birger, and in 1321 Duke Erik's widow, Ingeborg of Norway, gave away Skällsvik and the castle ruins as a gift.
The castle saw the turbulence of its age — when Duke Albert of Mecklenburg attacked Sweden in 1363, his fleet was able to pass unhindered to strike Söderköping, and pirates later did the same in force. By 1391 Stegeborg was owned by the Crown, with Margaret appointing the Danish knight Evert Moltke as sheriff. Several of the Vasa kings later lived at Stegeborg, and building continued into the late 16th century under John III, whose era gave the castle its curtain walls, western round tower and north-wing castle church.
From 1652 to 1689 Stegeborg was allotted to the Palatine counts John Casimir — who died that first year — and Adolph John. In the 1730s the crown sold the castle for building materials, and much of the superstructure was demolished; substantial masonry and the round tower survive as ruins.
Step inside
7 places to explore in 1590.
The record describes 7 distinct spots at Stegeborg Castle — including 1 interior: interior of the castle church in the north wing. Create your own photoreal reconstruction and walk through every one — more scenes means more photos, more angles and more rooms of the immersive experience.
Create History
Recreate Stegeborg Castle with AI to explore it.
The artist rebuilds it as it stood in 1590 — a photoreal walk that belongs to you alone. Pay with coins, no subscription needed.
Recreate Castle to Explore →Whose castle
Clans who held Stegeborg Castle.
The families that held Stegeborg Castle for a decade or more across its history — follow a name to its clan.
Vasa
Several of the Vasa kings lived at Stegeborg; John III's building works ran into the late 16th century.
