Krognoshuset, Medieval brick building at Mårtenstorget, Lund, Sweden.

Krognoshuset is a tall medieval red-brick building on a corner, with its long facade facing left and a stepped brick gable rising above. The steep roof is covered in red clay tiles, and the weathered brickwork shows sections of darker and lighter masonry. Two tall arched windows with white frames sit at ground level on the left facade, with a single round-arched window higher up; the right side has two more tall arched windows and a small square window, and another small square window sits near the top of the gable.

The structure was built around 1300 and belonged to the wealthy Krognos noble family, who held multiple properties across the Skåne region during the medieval period. Its preservation documents an important chapter in Lund's urban development.

The building has served as an art gallery since 1929, managed by Konstföreningen Aura and featuring rotating exhibitions of contemporary and historical Swedish work. Visitors regularly encounter new installations from local and regional artists.

The building is located at Mårtenstorget 3 and opens for visitors Thursday through Sunday with no admission fee. Its central location makes it easy to reach and simple to include in a city walk.

In 1916 the architect Theodor Wåhlin renovated the house to give it an original, monastery-like look, as it was then wrongly thought to be a remnant of the Blackfriars monastery; later research placed that monastery on Kiliansgatan instead.