The atrium originates from the Roman dwelling, where a central room with a roof opening served simultaneously as courtyard and reception space. In modern architecture, it refers to a multi-story, often glazed interior space that consolidates access routes and channels daylight deep into the building. Large administrative buildings, hotels, and shopping centers use the atrium as a climatically buffered intermediate climate zone and communicative center. The glazed roof construction requires careful planning regarding solar shading, smoke extraction, and heat loads. Notable examples include the Guggenheim Museum New York and the Lloyd's Building in London.