Infobox building | name = Marmorpalais | native_name = | former_names = | alternate_names = Marble Palace | image = Marmorpalais.jpg | alt = | caption = Marmorpalais | map_type = Germany#Brandenburg | map_alt = | map_caption = | relief = y | altitude = | building_type = Palace | architectural_style = Neoclassical | structural_system = | cost = | client = Frederick William II of Prussia | owner = Stiftung Preußische Schlösser und Gärten Berlin-Brandenburg | current_tenants = | landlord = | location = | address = | location_town = Potsdam | location_country = Germany | coordinates = | start_date = 1787 | completion_date = 1791 | inauguration_date = | renovation_date = | height = | floor_count = | floor_area = | main_contractor = | architect = Carl von Gontard Carl Gotthard Langhans | architecture_firm = | structural_engineer = | services_engineer = | civil_engineer = | awards = | website = [ Stiftung Preußische Schlösser und Gärten] | references = | footnotes = The Marmorpalais (or Marble Palace) is a former royal residence in Potsdam, near Berlin in Germany, built on the grounds of the extensive Neuer Garten on the shores of the Heiliger See. The palace was commissioned by King Frederick William II of Prussia and designed in the early Neoclassical style by the architects Carl von Gontard and Carl Gotthard Langhans. The palace remained in use by the Hohenzollern family until the early 20th century. It served as a military museum under communist rule, but has since been restored and is once again open to the public. The Marmorpalais was designed by the architects Carl von Gontard and (from 1789) Carl Gotthard Langhans, the designer of Berlin's Brandenburg Gate. The Marmorpalais was reserved as a summer residence for the private use of the king, who had an artistic temperament. With this new construction the nephew and successor of Frederick the Great dissociated himself from his childless uncle, whom he disliked and who favored earlier Baroque and Rococo forms. The red brick Marmorpalais was originally a two-story square building.