The Ancient Odeon of Philippopolis served as the seat of the City Council of the Antique City (Boulevterion), and was later used as a theater building.
It was built at the time of Emperor Adrian by recognizing four building periods of the building: from the second to the fourth century AD. As in antiquity, even today, Odeon is used for chamber theatrical, musical and literary events. The presence of a building with such a functional purpose in the central part of the Ancient City gives reason to assume the great significance of Philipopolis as a political and cultural center.
The Odeon is rectangular in plan volume and contains all elements characteristic of the covered theaters: skein, orchestra and cavea. The skein is relatively narrow in size, its length encompassing the entire width of the cavea. The platform (the podium) was 1.50 m higher than the level of the orchestra. The facade of the skein in the interior was high. This assumption is based on the height reached by the cavea-bearing structure, as well as on the fact that the sketch was a two-storey, executed in the characteristic Roman-style Corinthian Order System. The presence of vertical grooves in the wall of the sketch implies the existence of a structure for lifting and lowering a curtain, which in turn is characteristic of a theatrical building.