Georg-von-Cölln house, Commercial heritage building in Mitte district, Hannover, Germany.

The Georg-von-Cölln house is a steel frame building with a spacious arcade hall at ground level opening onto the market square. The facade is decorated with sculptural reliefs that display coats of arms from different cities and businesses.

The complex was built for the ironware business of Georg von Cölln, founded in the early 19th century, and consists of an office building with a rear warehouse at Am Markte 8. From September 2014 to October 2017 it served as the provisional parliament building of the Lower Saxony State Parliament, after earlier use by the Niedersächsisches Landesmuseum Hannover as "forum am markt". It is a protected monument and is to remain in use for conferences and meetings.

The building is named after the entrepreneur Georg von Cölln, whose ironware business was founded in the early 19th century and for whom the complex was built. Today the former office and warehouse building is used for conferences and meetings, and from September 2014 to October 2017 it housed the Lower Saxony state parliament as a provisional venue.

The building sits directly on the market square opposite the Marktkirche and is easily reached from the city center. The arcade structure provides covered passage even in bad weather, and the ground floor hall is freely accessible.

The coat of arms sculptures on the facade display not only local city symbols but also the mark of the Krupp industrial empire, an unusual combination showing ties between Hannover and the Ruhr industrial region. This mixing of civic and corporate emblems is rare for a market building.