The Stadium of Philippopolis was the ancient Roman stadium of Philippopolis, built in the 2nd century AD, during the Roman imperial period. It is among the largest and best preserved buildings from the time of the Roman Empire in the Balkan peninsula. At the time the stadium was built, Philippopolis was the capital of the Roman province of Thracia.
The stadium, approximately 250 m long and 50 m wide, could seat up to 30,000 spectators. Today, the northern curved part of the stadium is partially restored and is one of the most recognisable landmarks of the city among the many preserved buildings from Roman times.
Wikipedia https://en.wikipedia.org/wiki/Stadium_of_Philippopolis
Address 2 площад Джумая, Пловдив 4000, Bulgaria
Coordinates 42°8'51.765" N 24°44'52.243" E