The ancient theatre of Philippopolis is a historical building in the city center of Plovdiv (ancient Philippopolis), Bulgaria. Although this structure is commonly referred to as an amphitheatre, it is actually a traditional Roman theatre. It stands between the south-western slope of the Dzhambaz Tepe and the Taxim tepe hill within the old town, and is a major tourist attraction for travelers coming to the area. According to a builders’ inscription, discovered on the frieze-architrave of the eastern proskenion, the construction of the theatre dates back to the time of Emperor Trajan (reigned 98–117 AD).