Haus Gartlage, Architectural heritage monument in Osnabrück, Germany.

Haus Gartlage is a two-storey plastered manor house built of Piesberg sandstone at the end of the 16th century, with a tall hipped roof and a footprint of 13.5 by 29 metres. Its ground-floor walls are about one metre thick and partly pierced with loopholes; the upper floor once held a hall spanning the full width. Until 1964 a Saint Christopher figure carved around 1520, attributed to the Master of Osnabrück, stood in a niche on the south side.

The Gartlage estate was first documented in 1190 as property of the Prince-Bishopric of Osnabrück. A stone house from the 14th century is attested only by its foundations, located 120 metres west of the present building. In the 15th century the von Hake family owned the estate; the surviving manor house was built at the end of the 16th century on the core of a second stone building. Swedish troops plundered and partly burned the estate during the Thirty Years' War. In 1683 Nikolaus Eberhard von Snetlage donated it to the Gymnasium Carolinum, whose Jesuit directors used the house as a retreat until 1773.

The name Gartlage comes from the estate, and it survives in the street name Gartlager Weg, used since 1869, as well as in the district of Gartlage and the Carolinger Holz wood northeast of the house. The house itself lies in the Dodesheide district, not in Gartlage.

Visitors should view the building from outside as it is a protected monument not open for interior visits. The best time to visit is in good weather so you can fully appreciate the architectural details and the craftsmanship of the facade.

The building is made of plastered Piesberg sandstone, not timber framing. Its ground-floor walls are about one metre thick and partly fitted with arrow slits. Until 1964 a Saint Christopher figure carved around 1520, attributed to the Master of Osnabrück, stood in a niche on the south side.