Structural health monitoring of the Ninfeo Ponari by combined use of fibre optic sensors, photogrammetry and laser scanning

The Ninfeo Ponari is an ancient building dating back to the first century BC as part of a rich domus, located in the ancient Roman city of Casinum. It consists of two bodies: a rectangular room covered by a barrel vault and an atrium with no roof with a shallow pool in the middle, both paved with mosaics and decorated with wall paintings. The structural condition of the building is critical and its preservation is at risk, as it is located on a hill slope where some substantial sliding activity is occurring. Moreover, it is not protected by an efficient rainfall drainage system. Aim of this paper is to illustrate the strategies and the digital techniques recently applied to initiate a permanent monitoring of the building structural condition.