The Nassauer Haus or Schlüsselfeldersche Stiftungshaus in Nuremberg is a medieval residential tower made of so-called red castle sandstone. Although originally built in Romanesque style, after several reconstructions the house is still characterized by Gothic style elements. It is the last still existing residential tower in Nuremberg.
The tower stands in the Lorenzer Altstadt, opposite the Lorenzkirche, in Karolinenstraße 2.