At the end of the IV century, a large part of the theater was destroyed - by fire or an earthquake, but thanks to its restoration, it was preserved in its present form. It was discovered during archaeological excavations conducted in 1968-1979 by the Archaeological Museum in Plovdiv.

The restoration of the Roman theater in Plovdiv is recognized as one of the best achievements of the Bulgarian conservation school. The intervention is limited to the limits determined on the basis of careful research and by the exclusion of assumptions. The reconstruction was done strictly by the anastylosis method, and the new material was visibly marked. Today, the theater is a center in the skyline of the southern part of Trihalmieto, one of the emblems of Plovdiv and a functioning stage for classical drama, dance and music.