We start a new "blue" series in Arquitectonics, titled Advanced Theories and Practices, dedicated to the research on archi­tecture and urban planning, with an introductory volume to the subject of the relations between mind, land and society. This has been possible thanks to the web of co-edition between different universities and to a new international scientific com­mittee of very high level. This issue includes lectures presented at the International Congress on Arquitectonics, which took place in Barcelona in 2004, and summarizes moreover three lectures of architects in this same Congress, with "good" practice. We maintain the papers' "spoken" version, as if it were another "practical" level, even though this implies a certain disorder in the texts.