The main threats to the integrity of the property are high numbers of international tourists that represent a very important economic resource for the regional economy. The area of the small lake formed by earthquakes and thermal sources around the ancient civil agora, where thousands of tourists can swim between the ancient columns and marble architectural decorations, is particularly threatened. This has led to biological pollution and constant erosion of the ancient Roman marble elements, and the relevant authorities are planning to set up a monitoring system to assist in managing this problem.
Authenticity
Most of the property is free of modern buildings and the architectural monuments can easily be appreciated. Some old monuments are in use again, for example the theatre is used for performances with participation of thousands of people, while excavation and restoration works on the site are still going on. All the projects are based on anastylosis methods such as in thefrons scaenae of the theatre, the gymnasium and the templon of the church of St. Philip.
The monumental and archaeological remains truthfully and credibly express the Outstanding Universal Value of the property in terms of its setting, form, and materials. The mausoleums and Tripolis Street in the north necropolis, the city walls from the south eastern Roman Gate to the travertine terraces, the Latrina located to the east of Domitian Gate, the colonnaded street and the Gymnasium have been restored. The structure of the Bath-Basilica, which suffered earthquake damage, has been reinforced.