In 1940 the city government gave the cistern to a museum to administer. Major renovations in 1985-1987 were conducted to prepare the cistern for opening to the public, which happened in 1987. It was restored again by the municipality between 2017-2022.

The most recent restoration aimed at improving the seismic safety of the cistern (by installing tension bars between the arches and columns). The heavy platform was renewed as well in the form of a light steel one. The removal of cement imitation from the floor tiles also revealed brick stamps from the 5th century.