Advanced non-destructive techniques for the diagnosis of historic buildings: The Loka-Hteik-Pan temple in Bagan

The archaeological site of Old Bagan, located in the centre of Myanmar, is one of the most remarkable and ancient Asian site with over three thousand monuments, scattered in an area of about 80 km2. Thesite was hit in 2016 by the last of a series of earthquakes. The Loka-Hteik-Pan is a hollow-core templefeatured by a small elegant curvilinear tower. It was significantly damaged by the event, losing the upperpart of the tower, as many other temples of the area. Emergencies like seismic events generally requirequick responses and targeted solutions. When a built area is involved, damaged buildings need structuralassessments with a special focus on space and time occupancy, without compromising the reliability ofthe results. A workflow for data acquisition and analysis is proposed, using non-destructive techniquesto evaluate the materials performances and measure spatial changes over times. Deformation analysisis performed on LiDAR data, acquired prior and after the earthquake, with the goal of measuring small changes occurred in the wall surfaces. The preliminary results of the tests are presented with the purposeto provide a knowledge base, useful to guide the interventions for preserving the monument and its heritage.