A packed room of engineers and architects attended the presentation at The Building Centre to listen to Steve & Pierre discuss visionary engineering and creativity in stone. Pierre began with a history of the use of stone throughout the ages, singing the praises of the Gothic stonemasons (especially the French ones!), through to the modern era and gave examples of recent award winning stone structures. Steve then continued the presentation by outlining the principles used in design of post-tensioned stone. Steve also stressed the environmental benefits of using post-tensioned stone, particularly in comparison to a more conventional reinforced concrete designs. Many enthusiastic members of the audience asked questions and many more took turns testing the model bridge in the room by jumping on it, The evening concluded with a reception - a great mix of discussion and laughter.