|Type||Ancient Thracian, Greek and Roman Settlement|
|Area||Wall circuit: ca.78 ha (190 acres)|
Occupied: 78 ha (190 acres)+
|Founded||4th century BC|
|Part of a series on the ancient city of|
|Buildings and structures|
|• History • Timeline|
Philippopolis (Ancient Greek: ?, , or ) is one of the ancient names of the city of Plovdiv (amongst which are Thracian Eumolpia/Pulpudeva, Roman Trimontium) and is the one by which it was known for the most of its recorded history. The city became one of the largest and most important in region, as shown by its still impressive ancient remains, and was called "the largest and most beautiful of all cities" by Lucian.
In 342 BC Philip II of Macedon conquered the Thracian town and gave it his name. Later, Philippopolis became part of the Roman empire and capital of the Roman province Thracia. According to Ammianus Marcellinus, Philippopolis had a population of 100,000 in the Roman period.
The earliest signs of habitation on the territory of Philippopolis date as far back as the 6th millennium BC when the first settlements were established. Archaeologists have discovered fine pottery and objects of everyday life on Nebet Tepe from as early as the Chalcolithic, showing that at the end of the 4th millennium BC, there already was an established settlement there. Thracian necropolises dating back to the 2nd-3rd millennium BC have been discovered, while the Thracian town Eumolpias was established between the 2nd and the 1st millennium BC.
The fortified town was built by the Thracian tribe of the Bessi. In 516 BC during the rule of Darius the Great, Thrace was included in the Persian empire. In 492 BC the Persian general Mardonius subjected Thrace again, and it became nominally a vassal of Persia until 479 BC and the early rule of Xerxes I. The town was included in the Odrysian kingdom (460 BC-46 AD), a Thracian tribal union.
The town was conquered by Philip II of Macedon and the Odrysian king was deposed in 342 BC. Ten years after the Macedonian invasion the Thracian kings started to exercise power again after the Odrysian Seuthes III had re-established their kingdom under Macedonian suzerainty as a result of a somehow successful revolt against Alexander the Great's rule resulting in neither victory, nor defeat, but stalemate. The Odrysian kingdom gradually overcame Macedonian suzerainty but the city was destroyed by the Celts as part of the Celtic settlement of Eastern Europe, most likely in the 270s BC. In 183 BC Philip V of Macedon conquered the city, but shortly after the Thracians re-conquered it.
In 72 BC the city was seized by the Roman general Marcus Lucullus but was soon restored to Thracian control. In AD 46 the city was finally incorporated into the Roman Empire by emperor Claudius. It gained city status (municipium) in the late 1st century. As Trimontium it was an important crossroad for the Roman Empire and was called "the largest and most beautiful of all cities" by Lucian. Although it was not the capital of the Province of Thrace at this time (which was Perinthus), the city was the largest and most important centre in the province. It was the seat of the Union of Thracians and the Via Militaris (or Via Diagonalis), the most important military road in the Balkans, passed through the city. Roman times were a period of growth and cultural excellence and the ancient ruins tell a story of a vibrant, growing city with numerous public buildings, shrines, baths, theatres and a stadium. The large scale of public construction during the Flavian Dynasty (69-96 AD) led to the city being named Flavia Philippopolis.
In 172 a second wall was built to encompass part of the city which had already extended out of the Three Hills into the valley, but leaving other parts outside.
It became the provincial capital of Thrace in the early 3rd century.
In about 250 the Battle of Philippopolis involved a long siege by the Goths led by their ruler Cniva and after betrayal by a disgruntled citizen who showed them where to scale the walls, the city was burned and 100,000 of its citizens died or were taken captive according to Ammianus Marcellinus.
It prospered again in the 4th century like many cities in the region.
The layout of Philippopolis was revealed to a large extent by archeology between 1965-85 which with historical records confirm the presence of three archeological levels: Hellenistic, Roman and Late Roman.
The initial planning and construction of Philippopolis started during Philip II's rule (359-336 BC) and continued during the reign of Alexander the Great and the Diadochi. Some authors assume that the first stage of the construction of Philippopolis ended around 500 BC. The town originally built on the hills was extended to the plain. Archaeologists confirmed that the Hippodamian plan was applied to Philippopolis as in other ancient towns like Miletus, Ephesus, Alexandria and Olynthus. Hellenistic Philippopolis had a network of orthogonal gravel streets. Some of the streets had pavements, curbs and cambers to accommodate rain water drainage. The intersecting streets formed the rectangular city blocks (insulae) with residential and public buildings. A great number of public structures were built in Philippopolis such as theatre, stadium, agora, temples, thermae.
The first city wall of Philippopolis was built as early as the 4th century BC and fragments of this fortification system are visible today on the northern and northwest slopes of Nebet Tepe. The wall was provided with small gates that led to passages or tunnels inside the rock through which steps reached the northern foot of the hill.
Despite the unstable political and economic environment from the 4th century BC to the 1st century BC, large-scale urban planning and complex construction techniques were implemented in Philippopolis. The urban planning model from the Hellenistic period was strictly followed and developed after the city became part of the Roman empire.
Extensive renovation and large-scale construction took place after 46 AD in order to meet the growing needs of the population. A characteristic of the buildings in Roman Philippopolis was their large scale and lavish decoration which expressed the greatness and influence of the Roman Empire.
The Romans continued the legacy left by the Greek architects of Philippopolis; the unit of measure used by the Romans (the Roman foot - 296 mm) coincided almost entirely with the Attica step used in the Hellenistic period thus allowing them to easily follow the initial urban planning model of the town without making significant alterations.
In the Roman era the built-up area of Philippopolis in the plain totalled 50 ha (120 acres). It included around 150 insulae each with a width of 1 actus (35.5 m) and length of 2 actus (71 m). The existing street network was renovated and expanded with water supply and sewer system beneath it. The area of the road network amounted to 100,000 sq.m. The streets were paved with large granite slabs. The width of the streets was 15 Roman feet (4.4 m) while the width of the main streets reached 30 Roman feet (8.9 m).
In the 2nd c. AD, the area north of the forum was enhanced and important public buildings from the Hellenistic period like the theatre, the stadium, the agora, treasury and odeon were rebuilt and expanded.
In 172, according to an inscription found in the East Gate area from the reign of Emperor Marcus Aurelius, the city walls were strengthened and extended around the city in the plain in the areas to the east and west of the three hills, including, unusually, the stadium. Part of this wall can be seen today under Djumaya Square, next to the Stadium. However the wall was also built across part of the city lying to the south of the forum leaving many buildings outside the protection of the walls. Eventually this area became derelict and was used as a cemetery where early christian tombs have been discovered.
The odeon was built as a Hellenistic bouleterion, or council chamber, and underwent four reconstructions between the 1st and 4th centuries for use as a small theatre.
Evidence of the 250/1 destruction by the Goths has been discovered around the Odeon. After the Gothic invasions changes were made particularly noticeable in the East Gate complex, which had a triumphal arch in honour of Hadrian. The gate of the previous period was abandoned and a new route was added to the wall and the archway from the 2nd century was included.
Recent excavations have revealed a 1st c. triumphal arch, only the 2nd in Bulgaria.
The Roman aqueduct bridge in Plovdiv is the only one standing today in Bulgaria.
Three aqueducts of 22km length supplied mainly the lower part of the city, while the hills relied on wells and rainwater tanks. The aqueducts run parallel to each other in the neighbourhood of the suburb of Komatevo at separation of 30-40m, one a pipeline of clay pipes and two partially overhead aqueducts.
A section of the "western" aqueduct, which is considerably more massive, has been partially restored on Komatevsko Shose. Piers are also visible at the Roman stadium. Recent excavations have revealed more of the piers dating from the 2nd c. AD. 
It is assumed that the three aqueducts converged on the western slopes of Djendemtepe into a distribution tank (castellum aquae) which seems to have been destroyed in the construction of the modern tunnel.
The source of the water supply network was three waterfalls on the slopes of the Rhodope Mountains, two in the Marata locality near today's village of Markovo and one in the Kaynitsite locality near the present town of Kuklen. The catchments at Markovo are well researched; one of them is an underground reservoir measuring 13 × 7 m, partially destroyed; the second is a complex tunnel system: a central gallery and side branches. It is not fully investigated, but the length of one of the lateral branches is 76 m.
The distribution network in the city itself is located under the streets, with pipelines along all north-south streets, but only under a few in east-west directions. Street pipelines are built with clay pipes, with branches to separate houses and fountains with lead. The pipelines led to many public fountains and fountains which, although not found, are known from many sculptural fragments.
The total water flow is estimated at around 43,000 cubic metres per day.
In 2019, archaeologists have found a large stone slab at the Episcopal Basilica site, estimated to the third century. It was inscribed in Greek honoring the god Dionysus. The inscription reads: "For the victory, the health and the eternal existence of the emperors, Publius, Licinius Valerian and Gallien Augustin and for their whole house, for the holy senate and Roman people, and for the council and people's assembly of Philippopolis - the Thracian leader Dionysus dedicated the surviving mysteries, while the leader of the mysteries and eternal priest was Aurelius Mukianid, son of Mukian". This is followed by a list of all 44 members of the mystical society, several with the positions they occupy.