The principle which underpin the whole project comes from specific choices that are designed to decline the concept of sustainability in architectural terms. Through researchof the aesthetics of sustainability hopes to establish a research laboratory able to test the principles and solutions of low tech and high performance bio-climatic, containing wastesenergy and money. The achievement of sustainability is achieved through the proper elements of the architecture itself becomes manifest sustainability, limiting the supply ofengineering solutions and technology.The reference from which you started refers to a highly distinctive element of the agricultural landscape in which the EXPO will rise, which is the archetype of the shelter in this rural setting that is manifested in its most essential form with the barn.The straw is presented as a simple material to use, flexible, versatile, and renewable. It's lightweight, high-quality performance that allows an immediate reduction in costs and energy efficiency. The straw, unlike the hay, is an element of waste coming from the cultivation of cereals. It is used as a construction element and the insulation material.