Historical Konuralp is 8 km north of Düzce; first settlements there go back to 3rd century BC. Until 74 BC it was one of the most important cities belonging to the Bithynia State, which included Bilecik, Bolu, Sakarya, Kocaeli. It was conquered by Pontus and then by the Roman Empire. During the Roman period the city was influenced by Latin culture, and it changed its name to Prusias ad Hypium. Later on Christianity affected the city and after the separation of the Roman Empire in 395, it was controlled by the Eastern Roman Empire (the later Byzantine Empire).