Bauernburg Schwaghof, Medieval castle in Bad Salzuflen, Germany.

Bauernburg Schwaghof is a two-storey stone building with walls about one metre thick, a core from the late Middle Ages, and a half-timbered upper storey and roof level added in the early 17th century. It has a high entrance on the eaves side and narrow slit windows. It is on private ground and not open to the public.

The estate was first mentioned in the 12th century as Gut Svevedeshusun and originally served as a subsidiary property of Seligenwörden manor. In 1787 it passed into the territory of Lippe through a property exchange agreement.

The building stands as a reminder of how rural estates were once built to withstand threats, with its fortress-like design reflecting the concerns of farming communities. Visitors can see in its thick walls and narrow openings that defense was a priority for those who lived here.

The building is located in Bad Salzuflen and is visible from the public area, though it remains in private ownership. Visitors can view the architecture from outside and study the facade details from nearby vantage points.

The cellar ponds that survive today belonged to Seligenwörden manor, the abandoned estate of which Schwaghof was a subsidiary farm; a street name still recalls Seligenwörden, though archaeology has not located its exact site. The ponds are not part of the Bauernburg itself.