Kreuzgangstraße 11, Lost architectural monument in Magdeburg, Germany.

Kreuzgangstraße 11 was a two-storey building in Magdeburg's old town, completed in 1728 as a chapter house for the Nikolaistift. Its plastered facade was divided by pilasters, and the upper-floor windows had sculpted keystones. Inside, the rooms had stucco ceilings. The building was destroyed in World War II; its site is now within the Grüne Zitadelle.

The site originally held the cloister of the Nikolaistift. The large Stiftshaus was completed in 1728 and rented out; older records list it as Kreuzgangstraße No. 9. From 1731 to 1734 the later Prussian war minister Heinrich Christoph von Katte lived there as a tenant. In the 19th century the house, together with No. 10, served as a midwifery school and maternity ward, a predecessor of the Magdeburg state women's clinic. It was destroyed in World War II.

The house was built by the chapter of the Nikolaistift, which also erected neighbouring No. 10 to keep the plot from passing to third parties. Two owners of the small rear houses, Fiedler and Helmecke, sued the chapter over the new building; the chapter bought their three houses in 1738 and used them as rear buildings. From 1811 French officers were quartered here.

The building no longer exists; it was destroyed in the Second World War. Its former site on the north side of the Kreuzgangstraße now lies within the area of the Hundertwasserhaus Grüne Zitadelle. Today's Kreuzgangstraße runs north-south rather than west-east, so the historic address cannot be traced on the ground.

The site of the house now lies within the grounds of the Hundertwasserhaus Grüne Zitadelle, built after the war. Because postwar rebuilding abandoned the old street grid, the Kreuzgangstraße now runs north-south instead of west-east, so the original address no longer matches any street.