Title: Odrysian kingdom
Content:  The Odrysian Kingdom (Ancient Greek: Βασίλειον Ὀδρυσῶν) was a Thracian kingdom that existed from the early 5th century BC at least until the mid-3rd century BC. It consisted mainly of present-day Bulgaria and parts of Southeastern Romania (Northern Dobruja), Northern Greece and European Turkey. Dominated by the eponymous Odrysian people, it was the largest and most powerful Thracian realm and the first larger political entity of the eastern Balkans. Before the foundation of Seuthopolis in the late 4th century it had no fixed capital. The Odrysian kingdom was founded by king Teres I, exploiting the collapse of the Persian presence in Europe due 
Title: Odrysian kingdom
Content:  kingdoms were eventually conquered by the rising kingdom of Macedon under Philip II in 340. A much smaller Odrysian state was revived in around 330 by Seuthes III, who founded a new capital named Seuthopolis that functioned until the second quarter of the 3rd century BC. After that there is little conclusive evidence for the persistence of an Odrysian state, with the exception of a dubious Odrysian king fighting in the Third Macedonian War named Cotys. The Odrysian heartland was eventually annexed by the Sapaean kingdom in the late 1st century BC, which was converted into a Roman province in 45/6 AD.
Title: List of ancient great powers
Content:  The Odrysian Kingdom proper was a Thracian kingdom that existed from the early 5th century BC at least until the mid-3rd century BC. It consisted mainly of present-day Bulgaria and parts of Southeastern Romania (Northern Dobruja), Northern Greece and European Turkey. Dominated by the eponymous Odrysian people, it was the largest and most powerful Thracian realm and the first larger political entity of the eastern Balkans. Before the foundation of Seuthopolis in the late 4th century it had no fixed capital. The Odrysian kingdom was founded by king Teres I, exploiting the collapse of the Persian presence in Europe due to failed invasion of 
Title: Odrysian kingdom
Content:   Although covering almost a third of the entire Balkan peninsula at its peak, the Odrysian kingdom is unlikely to have had state-like institutions before the reign of Seuthes III. In general, the Odrysian kingship was heavily influenced by the Persian court, while also bearing many similarities to the one practiced in Macedon. Unlike in the contemporary Greek city-states, the Odrysian kings needed to legitimize their rule by military prowess, religion and gifts. The royal gift exchange, a practice originally adopted from the Persian court, was especially important for legitimation. While the king received valuable gifts like gold, silver, textiles or horses, he was also expected 
Title: Odrysian kingdom
Content:  and administrators deriving not only from the royal court, but also from rival tribes. Thucydides called said local rulers paradynasteuontes, meaning "those who share power". A similar elite class loyal only to the king, the hetairoi, could also be found in Macedon. The Odrysian kingdom appears to have been rather decentralized, consisting of many different regional elites vying for power. Their rule over their subjects, who lived in scattered hamlets, was very loose and exercised mainly through raiding and demanding tribute. There is no evidence that the early Odrysian kings had a fixed capital. Instead, they probably maintained a mobile court, moving throughout the 
Title: Odrysian kingdom
Content:  Sofia, 2006. ; S. Topalov, The Odrysian Kingdom from the Late 5th to the Mid-4th C. B.C., Sofia, 1994. M. Tacheva, The Kings of Ancient Thrace. Book One, Sofia, 2006. ; S. Topalov, The Odrysian Kingdom from the Late 5th to the Mid-4th C. B.C., Sofia, 1994. M. Tacheva, The Kings of Ancient Thrace. Book One, Sofia, 2006. ; S. Topalov, The Odrysian Kingdom from the Late 5th to the Mid-4th C. B.C., Sofia, 1994. M. Tacheva, The Kings of Ancient Thrace. Book One, Sofia, 2006. ; S. Topalov, The Odrysian Kingdom from the Late 5th to the Mid-4th C. B.C., 
Title: Odrysian kingdom
Content:  480 BC. Building his realm on a privileged warrior aristocracy, he and his son Sitalces expanded the realm from the Danube in the north to the outskirts of Abdera at the Aegean Sea. He also expanded to eastern Thrace, although he suffered a setback at the hands of the Thynoi. In the north-east, he cemented the position of his realm by allying himself with the kingdom of Scythia under king Ariapeithes, who married Teres' daughter. In conclusion, the Odrysians were the first to supersede the Thracian tribal system and establish a large state in the eastern Balkans.  Around the middle of the 5th century, when Sitalces had not yet succeeded 
Title: Odrysian kingdom
Content:  distribute gifts like artefacts, women or land to earn the loyalty and achieve the expansion of his military retinue. Such systems are inevitably unstable, royal authority would always remain rather fluid. Due to the fragmentary nature of the remaining sources, the royal court and the administration of the kingdom must remain largely obscure. It can be assumed that, as in early Macedon, the Odrysian kings formed the heart of the realm and controlled the policy and the minting of coins, appointed loyal deputies and commanded the troops on the battlefield. The realm was essentially the king's estate. Below the king was an elite of horse 
Title: Odrysian kingdom
Content:  Residences and temples of the Odrysian kingdom have been found, particularly around Starosel in the Sredna Gora mountains. Archaeologists have uncovered the northeastern wall of the Thracian kings' residence, 13 m in length and preserved up to 2 m in height. They also found the names of Cleobulus and Anaxandros, Philip II of Macedon's generals who led the assault on the Odrysian kingdom.
Title: Odrysian kingdom
Content:  Battle of Actium in 31 BC, the Romans abolished the Asti dynasty and established the Sapaeans in Bizye, the capital of the former. The Sapaeans of Bizye created a large kingdom loyal to Rome and even expanded into the interior. Little is known about how the Sapaeans administrated this region, although they made Philippopolis a royal residence. In 21 AD king Rhoemetalces II took refuge in Philippopolis when he was confronted with a rebellion, among them Odrysians. While the historian Tacitus described them as powerful, their uprising failed due to their bad coordination. The Romans eventually dissolved the Sapaean kingdom in 45/6 and turned it into the province of Thracia.

Question: What is the capital of Odrysian kingdom?
Answer: Seuthopolis.