The Ancient theatre (Antichen teatur) is probably the best-known monument from antiquity in Bulgaria.
During recent archaeological survey, an inscription was found on a postament of a statue at the theatre.
It revealed that the site was constructed at the 90s of the 1st century CE.
The inscription itself refers to Titus Flavius Cotis, the ruler of the ancient city during the reign of Emperor Domitian.

The Ancient theatre is situated in the natural saddle between two of the Three Hills.
It is divided into two parts with 14 rows each divided with a horizontal lane.
The theatre could accommodate up to 7,000 people.
The three-story scene is on the southern part and is decorated with friezes, cornices, and statues.
The theatre was studied, conserved, and restored between 1968 and 1984.
Many events are still held on the scene including the Opera Festival Opera Open, the Rock Festival Sounds of the Ages, and the International Folklore festival.
The Roman Odeon was restored in 2004.
It was built in the 2nd–5th centuries and is the second (and smaller) antique theatre of Philipopolis with 350 seats.
It was initially built as a bulevterion, an edifice of the city council, and was later reconstructed as a theatre.

The Ancient Stadium is another important monument of the ancient city.
It was built in the 2nd century during the reign of the Roman Emperor Hadrian.
It is situated between Danov Hill and one of the Three Hills, beneath the main street from Dzhumaya Square to Kamenitsa Square.
It was modelled after the stadium in Delphi.
It was approximately 240 metres (790 feet) long and 50 metres (160 feet) wide, and could seat up to 30,000 spectators.
The athletic games at the stadium were organised by the General Assembly of the province of Thrace.
In their honour, the royal mint of Philippopolis coined money featuring the face of the ruling emperor as well as the types of athletic events held in the stadium.
Only a small part of the northern section with 14 seat rows can be seen today; the larger part lies under the main street and a number of buildings.

The Roman forum dates from the reign of Vespasian in the 1st century and was finished in the 2nd century.
It is near the modern post office next to the Odeon.
It has an area of 11 hectares and was surrounded by shops and public buildings.
The forum was a focal point of the streets of the ancient city.

The Eirene Residence is in the southern part of the Three Hills on the northern part of an ancient street in the Archeological underpass.
It includes remains of a public building from the 3rd–4th centuries which belonged to a noble citizen.
Eirene is the Christian name for Penelopa, a maiden from Megadon, who was converted to Christianity in the 2nd century.
There are colourful mosaics which have geometrical forms and figures.

On Nebet hill are the remains of the first settlement which in 12th century BC grew to the Thracian city of Eumolpias, one of the first cities in Southeastern Europe.
Massive walls surrounding a temple and a palace have been excavated.
The oldest part of the fortress was constructed from large syenite blocks, the so-called "cyclopean construction".
The Ancient theatre (Antichen teatur) is probably the best-known monument from antiquity in Bulgaria. During recent archaeological survey, an inscription was found on a postament of a statue at the theatre. It revealed that the site was constructed at the 90s of the 1st century CE. The inscription itself refers to Titus Flavius Cotis, the ruler of the ancient city during the reign of Emperor Domitian.
The Ancient theatre is situated in the natural saddle between two of the Three Hills. It is divided into two parts with 14 rows each divided with a horizontal lane. The theatre could accommodate up to 7,000 people. The three-story scene is on the southern part and is decorated with friezes, cornices, and statues. The theatre was studied, conserved, and restored between 1968 and 1984. Many events are still held on the scene including the Opera Festival Opera Open, the Rock Festival Sounds of the Ages, and the International Folklore festival. The Roman Odeon was restored in 2004. It was built in the 2nd–5th centuries and is the second (and smaller) antique theatre of Philipopolis with 350 seats. It was initially built as a bulevterion, an edifice of the city council, and was later reconstructed as a theatre.
The Ancient Stadium is another important monument of the ancient city. It was built in the 2nd century during the reign of the Roman Emperor Hadrian. It is situated between Danov Hill and one of the Three Hills, beneath the main street from Dzhumaya Square to Kamenitsa Square. It was modelled after the stadium in Delphi. It was approximately 240 metres (790 feet) long and 50 metres (160 feet) wide, and could seat up to 30,000 spectators. The athletic games at the stadium were organised by the General Assembly of the province of Thrace. In their honour, the royal mint of Philippopolis coined money featuring the face of the ruling emperor as well as the types of athletic events held in the stadium. Only a small part of the northern section with 14 seat rows can be seen today; the larger part lies under the main street and a number of buildings.
The Roman forum dates from the reign of Vespasian in the 1st century and was finished in the 2nd century. It is near the modern post office next to the Odeon. It has an area of 11 hectares and was surrounded by shops and public buildings. The forum was a focal point of the streets of the ancient city.
The Eirene Residence is in the southern part of the Three Hills on the northern part of an ancient street in the Archeological underpass. It includes remains of a public building from the 3rd–4th centuries which belonged to a noble citizen. Eirene is the Christian name for Penelopa, a maiden from Megadon, who was converted to Christianity in the 2nd century. There are colourful mosaics which have geometrical forms and figures.
On Nebet hill are the remains of the first settlement which in 12th century BC grew to the Thracian city of Eumolpias, one of the first cities in Southeastern Europe. Massive walls surrounding a temple and a palace have been excavated. The oldest part of the fortress was constructed from large syenite blocks, the so-called "cyclopean construction".
Plovdiv