Adapazarı () is a city in northwestern Turkey and the central district of Sakarya Province. The province itself was originally named Adapazarı as well. Adapazarı is a part of the densely populated region of the country known as the Marmara Region. In 2014, the city had a population of 462,087. History The history of Adapazarı dates back to 378 BC, when it was called Agrilion (Ἀγρίλιον in Greek). Ancient settlers included Phrygians, Bithynians, Cimmerians, Lydians, Greeks, and Persians, but Adapazarı got its identity from the ancient Hellenistic, Romans, and Greek Byzantine rulers. After Alexander the Great's conquests, the Persians were forced out of the region. One of the most important remains of historical significance is the Justinianus Bridge () built by Byzantine Emperor Justinian in 533 AD. Historically, it was situated on the old military road from Constantinople (now Istanbul) to the east, connected in Late Antiquity by the important Sangarius Bridge and, since the end of the 19th century, by a branch line with the Anatolian railway. In 1868, the Adapazarı Municipality was officially founded on the town called Der Seadet. A sugar factory and agricultural sugar factory attracted many migrants and accelerated the industrialization of the city. A law passed on 17 June 1954 in the Grand National Assembly saw the city separated from Kocaeli Province and made the center of its own province. The 1999 Marmara earthquake affected Adapazarı and inflicted losses in lives and damage. In the 2000 official census, the population was recorded as 158 474. By official decree, the province was renamed Sakarya after the Sakarya River which runs through it. Economy Adapazarı is the location of a large automobile factory owned by the Toyota Motor Corporation, as well as the Hyundai EURotem train factory. Tank Pallet 1st Main Maintenance, one of the biggest Turkish defense contractors, and Otokar, a major manufacturer of buses and military vehicles, are located in Sakarya. Other major industries in the city and its surrounding province include textile factories for silk and linen products. Agriculture and forestry also form an important part of the city's economy, with the production of tobacco, hazelnuts (fındık variety), walnut-wood, cocoons and vegetables. Adapazari is one of the most important industrial capitals of Turkey. While Turkey is a developing country, the city of Adapazari renovated its infrastructure and industry after the 17 August 1999 catastrophic earthquake which left more than 18,000 casualties behind. In