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              The Great
                  Greenhouse - National Botanic Garden of Wales
                
                
                  
                  
                  
                    
                      
                        
                          
                            Architect 
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                            Foster +
                              Partners 
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                            Date Built 
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                            1995 - 2000 
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                            Location 
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                            National
                                Botanic Garden of Wales near
                                Llanarthney, Carmarthenshire 
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                            Description 
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                            The centre-piece of the
                              National Botanic Garden of Wales is the
                              Great Glasshouse which, when it was
                              completed, was the largest single-span
                              glasshouse in the world.  Foster +
                              Partners describe it as,
                              
                              "Elliptical in
                                plan," and add that, "the building swells from the
                                ground like a glassy hillock, echoing
                                the undulations of the surrounding
                                landscape." 
                               
                              The roof measures 99 by 55 metres and is
                              supported by 24 arches.  To optimise
                              energy usage the building has a
                              computer-controlled system that opens and
                              closes glazing panels to regulate the
                              levels of temperature, humidity and air
                              movement. 
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