Telge hus, Medieval fortress ruin in Södertälje, Sweden

Telge hus is a medieval fortress ruin on Slottsholmen in Linasundet, north of Södertälje. The stone house foundation on the central hill measures 22 by 10 metres and stands up to three metres high, built of mortared fieldstone and brick. A smaller 5 by 4 metre foundation lies southwest, and earthen terraces and a visible ditch remain.

First documented in 1400, this fortress served as an administrative center for tax collection across the medieval Telgehus district. The district encompassed the regions of Öknebo, Hölebo, and Svartlösa under royal authority.

The name comes from the old settlement that once stood here, reflecting its medieval roots. Visitors can see how the structure fits into the landscape and understand its role as a working fortification in daily life.

The ruins are directly accessible near the modern harbor and easy to visit. Artifacts recovered from excavations are on display at Torekällbergets Museum in Södertälje for those wanting more detailed information.

Divers in 2000–2002 found the remains of a timber crib pier and a stake barrier that once guarded the fortress harbour in Linasundet. On land, crossbow bolts, horseshoes, spurs and fragments of chain mail came to light, dated by radiocarbon analysis to the late 1200s or early 1300s.