Campi Alto di Norcia and its churches: first draft of the damages observation due to the earthquake of 2016 - Campi Alto di Norcia e le sue chiese: prima ricognizione dei danni dopo il sisma del 2016

The seismicity of the Central Italy and of Umbria region is well known from centuries and also the small and beautiful historic center of Campi Alto di Norcia was damaged several times and several time was also restored without losing its identity. Many residential buildings were repaired over the centuries but, only in the last 30 years, modern techniques in r.c were introduced. The earthquake of 1997 already showed the inefficiency of those techniques, incompatible with the structures of the existing historic buildings. After the shock of 2016 it is again possible to verify the performances of those strengthening intervention. Thanks to the comparison between the current observations and the data achieved by surveys and ND tests carried out 15 years ago for a CNR-GNDT contract after the earthquake of 1997-98 in Umbria-Marche regions, the paper presents a first draft of the damages observed in Campi Alto after the seismic events of 2016. Also two churches are considered. Those data together with the historical data, allow to understand better the causes of the damage, hoping to reduce the loss of this cultural heritage.