National Botanic Garden of Wales that is. Some facts and figures follow the picture. This is with a Samyang 7.5mm FE P6100761-RS by Dave in Wales, on Flickr GREAT GLASSHOUSE FACTS AND FIGURES The Glasshouse was designed by the world renowned architect Lord Norman foster and partners. It is the world’s largest single span Glasshouse measuring 110m (374`) long by 60m (204`) wide. The internal landscape covers 3500m2 (40500`2), while the glass dome covers 4500m2 (15300`2). The dome is the shape of an elliptical torus and consists of 785 panes of glass, most of which are 4m x 1.5m (13.5` x 5`). Each glass plane consist of two 9mm (9/25”) thick sheets of glass with a laminated film in between making a glass sandwich 18mm (18/25”) thick in total. The glass dome is tilted by 7 degrees on its axis and is orientated to face south this helps capture the maximum amount of sunlight in a day. Steel Ball and Socket joints attach 24 tubular arches to the concrete plinth the special joints allow for expansion of the steel ribs which cover the glasshouse. 147 computer controlled vents regulate a fully controllable and natural airflow. Heat is provided from a biomass furnace which in conjunction with the climate control prevents the glasshouse temperature falling below 9oC. High mounted fans, blow air around the glasshouse interior this simulates the windy conditions of the Mediterranean regions and strengthen the plants. The Glasshouse is divided into 5 regions including the Mediterranean Basin (and the Canary Islands), Costal California, Chile, Cape province of south Africa and South Western Australia all within a Katheryn Gustafson Landscape design.