The famous Senedd,which was opened in 2006 ,is situated in a prime position on the water front in Cardiff Bay.Morever, the structure of Senedd is built in the mind to effective energy. Furthermore,the Facade is an indigeous slate used on the external walls and the floors internally and externally cleverly brings the Bay up and into the building.In additions,the roof plane around the cowel turns down to forms a funnel in the debating chamber to able to get solar energy and ventillation. On the contrary,the cowl allow negative pressure avoiding hot air in the debating chamber to be drawn out.On the other hand,the Committee Roomshave twice tall,glazed walls that face out into the internal courtyard.Likewise,the Orielis an open,public space giving views of the Siambr at task. Four artists were hired to decorate the building.Likewise,the Lantern allows natural daylight pass in the Siambr.Besides,the Siambr is the big and circular is the debating chamber is heart of the Senedd .All the parts of Senedd have a useful function.www.bbc.co.uk and http://www.assemblywales.org/