Relatively recently designers all over the world have embarked on a journey of rediscovering more sustainable materials and building techniques, unbaked clay being amongst the most popular. This technique was widely spread in the south of Sardinia until the breakthrough of concrete in the 70s. However, we can still see entire villages built using this method. The idea – and necessity – to use local organic materials, created a conglomerate of buildings that were, in fact, an extension of earth itself, as if the fields were made of a malleable substance you could shape into houses and shops. The same "necessity rule" applies to various other villages in the territory made with local resources such as granite, stone, bricks and so on. This basic yet highly efficient way of urban planning started as a need and, as a result, gave each place a distinctive identity that is in harmony with the context it inhabits.