Consciousness of urban agglomeration’s immensity has promoted some critical visions of this model, like urban bioregion: a reference scenario that valorises the ‘intermediate territory’ in-between the cities as an important seat of patrimonial values and ecosystem services. Public ecosystem functions with social utilities situated in the intermediate territory recalls the three principles defined by Vitruvio (firmitas, utilitas, venustas) and Alberti (necessitas commoditas, voluptas) for anthropic works. The paper develops this reflection, explaining the relation between urban bioregion and ecosystem services concepts, highlighting public functions conducted by intermediate territory and establishing correspondences between these last and Vitruvian and Alberti’s principles. Conclusion identifies the reinforcement of public action on the intermediate territory as a strategic work track.
Keywords: Urban bioregion; ecosystem services; architectural classical treatises