Bolu is a city in northern Turkey, and administrative center of the Bolu Province and of Bolu District, located on the highway between Istanbul and Ankara. Its population is 184,682 (2021).
The city has been governed by mayor Tanju Özcan (CHP) since local elections in 2019. It was the site of Ancient Claudiopolis and has also been called Eskihisar ("old fortress") (and as such has several Turkish namesakes).
Bolu Province (Turkish: Bolu ili) is a province in north-western Turkey, between the capital, Ankara, and the largest city in the country, Istanbul. Its area is 8,313 square kilometres (3,210 sq mi), and its population is 320,824 (2022). The capital city of the province is Bolu.
Antinous, also called Antinoös, (/ænˈtɪnoʊʌs/; Ancient Greek: Ἀντίνοος; c. 111 – c. 130) was a Greek youth from Bithynia, a favourite and lover of the Roman emperor Hadrian. Following his premature death before his 20th birthday, Antinous was deified on Hadrian's orders, being worshipped in both the Greek East and Latin West, sometimes as a god (θεός, theós) and sometimes merely as a hero (ἥρως, hḗrōs).
Little is known of Antinous's life, although it is known that he was born in Claudiopolis (present day Bolu, Turkey), in the Roman province of Bithynia et Pontus. He was probably introduced to Hadrian in 123, before being taken to Italy for a higher education. He had become the favourite of Hadrian by 128, when he was taken on a tour of the Roman Empire as part of Hadrian's personal retinue. Antinous accompanied Hadrian during his attendance of the annual Eleusinian Mysteries in Athens, and was with him when he killed the Marousian lion in Libya, an event highly publicised by the Emperor. In October 130, as they were part of a flotilla going along the Nile, Antinous died amid mysterious circumstances. Various suggestions have been put forward for how he died, ranging from an accidental drowning to an intentional human sacrifice or suicide.
Otoyol 4 (English: Motorway 4), named Anatolian Motorway (Turkish: Anadolu Otoyolu) and abbreviated as O-4, is a toll motorway connecting the northwestern Marmara region to the Central Anatolia Region in Turkey. It runs parallel to the D.100 for more than half of its length and then parallels the D750 for most of the eastern half. The O-4 is a major expressway in Turkey as it connects eastern Istanbul and the heavily urbanized northeastern shore of the Sea of Marmara to the nation's capital, Ankara. The O-4 also makes up part of the International E-road network E80 and E89 as well as the AH-1 of the Asian Highway Network.
The O-4 is the longest completed motorway in Turkey spanning 379 km (235 mi), just 14 km (8.7 mi) longer than the O-52. The partially-opened O-5 is expected to surpass the length of the O-4, when it is completed in 2019, with a total length of 407 km (253 mi). but nowadays the longest motorway in Turkey is Otoyol 21 with the opening Ankara-Niğde section. Construction of the O-4 began in 1984 and was widely completed in 1992 except for a short gap through the mountains west of Bolu. This gap was connected in 2006, with the opening of the Mount Bolu Tunnel.
Bithynium or Bithynion (Ancient Greek: Βιθύνιον) was an ancient city in Bithynia. Its site is occupied by the modern town of Bolu, Asiatic Turkey.