Telge hus Travel Guide
Free Guide: A small, atmospheric 14th‑century borgruin on Slottsholmen where stone foundations and grassy terraces recall medieval life beside Mälaren.
A brief summary of Telge hus
A small, atmospheric 14th‑century borgruin on Slottsholmen where stone foundations and grassy terraces recall medieval life beside Mälaren.
Telge hus, also known as Ragnhildsborg, is the ruined remains of a 14th‑century administrative castle on Slottsholmen in northern Södertälje. The site preserves stone foundations, terraced embankments and visible traces of a moat; archaeological finds from excavations are displayed at the local museum. The ruin sits beside calm Mälaren waters and is protected as a cultural heritage site, its low walls and grassy terraces offering a quiet, evocative glimpse of medieval Sweden.
On-site amenities
Information boards
Seating areas
Picnic areas
Trash bins
Opening hours
- Every dayOpen 24 hours
Opening hours as listed on the venue’s Google Business Profile. Hours can change for services and special events, so check with the venue before you go.
- Address
- Ragnhildsborgsvägen, 152 50 Södertälje
Getting there
Public bus and short walk
Bicycle
Car then short walk
Discover more about Telge hus
Origins and medieval purpose
Telge hus was founded in the medieval era, with the earliest stone phases dated to the 1300s; the site appears in written sources from the 1400s and functioned as a local administrative and defensive centre for the surrounding Telgehus county between the 14th and early 16th centuries. Archaeological work has identified at least two castle phases: an early waterfront complex and a later stone house with vaulted rooms and a tower. The layout and finds — including weapon fragments and domestic objects — point to a site that combined governance, customs control over water routes and defensive capability.
What remains on the island
Today the ruin comprises the raised stone foundation of the main house (approximately 22 × 10 metres internally) together with a smaller house foundation, terracing and traces of former earthworks and moat lines. Wall fragments built of fieldstone and brick stand low but distinct on a grassy knoll; the house foundation’s inner height measures several metres where original masonry has survived. Post‑glacial shoreline change means the island is larger now than in medieval times, so archaeological deposits appear both onshore and in the surrounding shallow water.
Archaeology and discoveries
Systematic excavations in the early 20th century and later marine archaeological surveys have clarified the site’s sequence: a wooden or earlier structure succeeded by a stone hall with vaulted brick roofs and a defensive tower. Finds recovered from the site and nearby waters include arm‑bow bolts, a horse shoe, metal fittings and boat remains; many of these artefacts are curated by local museums. Conservation work in recent decades has stabilised the visible masonry and revealed features that help interpret how the castle worked within its landscape.
Landscape, ecology and conservation
Slottsholmen’s grassy terraces and shoreline set Telge hus against open water views of Mälaren. Local conservation measures aim to protect the exposed masonry from root damage and freeze–thaw erosion; periodic maintenance and careful grazing have been used to keep vegetation low and reduce pressure on the fragile ruins. The immediate area contains information panels and an arranged firepit with seating nearby, supporting interpretive visits without heavy infrastructure.
Visitor character and sensory notes
The site has a quiet, contemplative atmosphere: low stone walls, turf‑covered mounds and the lapping of shallow water create a strong sense of place. On clear days the ruins cast crisp shadows across the grass and the water reflects the sky; in windier weather the soundscape is dominated by water and reed rustle. The small scale of the remains rewards a slow, observational visit rather than a hurried stop.
Connections and ongoing significance
Telge hus is a protected archaeological site that speaks to regional medieval administration and maritime control of trade routes. Its material traces link to displays and archives held in local heritage institutions, and the ruin continues to be a point of interest for archaeology, conservation and local history projects. The site’s modest scale makes it accessible as a short cultural stop while still offering layered evidence of centuries of change.
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Guest reviews
Best time to go
Quietest: Jan, Feb & Dec · before 7am
Busy times are Evendo estimates for a typical year, to help you plan. Actual crowds vary with events, school holidays and the weather.
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