The effects of seismic attacks in oldest parts of hit towns mostly depend on the quality of materials and construction technique even for low and medium intensity earthquakes. The negative consequences of traditional construction approaches appeared in all their evidence in many areas of Central Italy affected by recent seismic sequences of medium intensity (M5-M6) in 2016-17 where entire villages were destroyed. The reconstruction should solve the problem to rebuild with safety but preserving the historical aspect of buildings and landscape. This paper presents a particular application of the known technique of seismic isolation for the reconstruction with integral seismic protection of the worldwide known village of Castelluccio di Norcia in Umbria (Central Italy). The adoption of a seismic isolation system at city scale involves the construction of a large floating platform, having the dimensions of the entire compartment, supported by seismic isolators. In the considered case the platform is stepped due to the site orography, and, above it buildings are built with the aesthetic and constructive characteristics of the collapsed original ones. The solution allows a correct interpretation of the objective to rebuild "as it was, where it was", safeguarding the landscape, prolonging the lifetime, saving the expected cost.
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