Pertev Pasha Mosque

Kocaeli University (Turkish: Kocaeli Üniversitesi) is a state university in İzmit, Turkey. It was founded as the Academy of Engineering and Architecture of Kocaeli in 1976. The electrical and mechanical engineering departments, basic sciences, and department of modern languages were the original departments of the academy. It became a part of Yıldız University in 1982, and split from it in 1992. In July 1992, the Turkish government decided to build 22 universities nationwide, including Kocaeli University. Before the 1999 İzmit earthquake, which can be regarded as the turning point for the rebirth of the university, Kocaeli University had approximately 20,000 students, 1,150 educational staff and a campus of 650,000 square meters. Kocaeli University lost nearly 75% of its physical structure in the earthquake, but its prior expansion site Arslanbey Campus rapidly compensated for the university's losses. The university moved to Umuttepe Campus in 2004. Kocaeli University's central Umuttepe Campus is located just outside Izmit in the region of Kocaeli, the most heavily industrialized region of Turkey. Most of its faculties are on this campus, except the Faculty of Fine Arts, the Faculty of Architecture & Design, the Faculty of Dentistry, and the Faculty of Animal Husbandry. Istanbul is only 90 kilometres (56 mi) away, and its secondary international airport was developed on a site 50 kilometres (31 mi) from Izmit, making the university much more accessible in recent years. Since Kocaeli is a near neighbor of Istanbul, many of its students come from Istanbul. The university has established a department of international relations that monitors Bologna developments closely and oversees KOU's participation in the Erasmus and Leonardo da Vinci student mobility schemes. With membership in the European University Association, KOU is aiming for greater international recognition of its academic work. The university, while focusing on technical and engineering subjects, offers an extensive selection of courses in social sciences and arts as well.

İzmit (Turkish pronunciation: [ˈizmit]) is a municipality and the capital district of Kocaeli Province, Turkey. Its area is 480 km2, and its population is 376,056 (2022). The capital of Kocaeli Province, it is located at the Gulf of İzmit in the Sea of Marmara, about 100 km (62 mi) east of Istanbul, on the northwestern part of Anatolia. Kocaeli Province (including rural areas) had a population of 2,079,072 inhabitants in 2022, of whom approximately 1.2 million lived in the largely urban İzmit City metro area made up of Kartepe, Başiskele, Körfez, Gölcük, Derince and Sapanca (in Sakarya Province). Unlike other provinces in Turkey, apart from Istanbul, the whole province is included within the municipality of the metropolitan center. İzmit was known as Nicomedia (Greek: Νικομήδεια) and Ólbia (Greek: Ὀλβία) in antiquity, and was the eastern and most senior capital city of the Roman Empire between 286 and 324, during the Tetrarchy introduced by Diocletian. Following Constantine the Great's victory over co-emperor Licinius at the Battle of Chrysopolis in 324, Nicomedia served as an interim capital city for Constantine between 324 and 330, when he rebuilt and expanded the nearby city of Byzantium as the new Roman capital; formally dedicating it in 330 with the name Nova Roma, before he soon renamed it as Constantinopolis (modern Istanbul). Constantine died at a royal villa near Nicomedia in 337. During the Ottoman Empire, İzmit was the capital of the Sanjak of Kocaeli.

The İzmit Clock Tower (Turkish: İzmit Saat Kulesi) in İzmit, Turkey is one of many clock towers that were built throughout the Ottoman Empire as a result of the decree which was sent to the provincial governors to commemorate the 25th anniversary of Sultan Abdülhamid II's ascension to the Ottoman throne. It was designed by architect Vedat Tek upon the order of Musa Kazım Bey, the governor of İzmit, and built in 1902. Other sources name the architect of the tower as Mihran Azaryan who was an Armenian-Ottoman of Izmit origin.The neoclassical clock tower, which stands just in front of the Hünkar Pavilion of Sultan Abdülaziz, has four floors with dimensions 3.65 m × 3.65 m (12.0 ft × 12.0 ft). The ground floor houses fountains, while the clock is on the top floor. All four facades of the middle floors are decorated with the seal of Sultan Abdülhamid II. The pointed cone on top is coated with lead. The clock tower has been an inseparable part of the history of İzmit throughout the 20th century, and has become the symbol of the city. In the former Balkan provinces of the Ottoman Empire, particularly in present-day Serbian, Bosnian and Montenegrin towns such as Belgrade, Prijepolje, Sarajevo, Banja Luka, Gradačac and Stara Varoš, similar Ottoman era clock towers are still named Sahat Kula (deriving from the Turkish words Saat Kulesi, meaning Clock Tower.) It was restored in 2006.

Nicomedia (; Greek: Νικομήδεια, Nikomedeia; modern İzmit) was an ancient Greek city located in what is now Turkey. In 286, Nicomedia became the eastern and most senior capital city of the Roman Empire (chosen by the emperor Diocletian who ruled in the east), a status which the city maintained during the Tetrarchy system (293–324). The Tetrarchy ended with the Battle of Chrysopolis (Üsküdar) in 324, when Constantine defeated Licinius and became the sole emperor. In 330 Constantine chose for himself the nearby Byzantium (which was renamed Constantinople, modern Istanbul) as the new capital of the Roman Empire. The city was incorporated into the Ottoman Empire with the victory of Sultan Orhan Gazi against the Byzantine Empire. The Byzantines managed to retake it in the aftermath of the Battle of Ankara, but it fell definitively to the Ottomans in 1419.

USS Eversole (DD-789) was a Gearing-class destroyer of the United States Navy, the second Navy ship named for Lieutenant (junior grade) John T. Eversole (1915–1942), a naval aviator who was killed in the Battle of Midway. She later served in the Turkish navy from 1973 to 1995 as TCG Gayret (D-352) and is now a ship museum. Eversole was launched on 8 January 1946 at the Tacoma Washington shipyard of Todd-Pacific Shipyards, Inc., Seattle, Washington; sponsored by Mrs. S. R. Eversole, mother of Lt. (j.g.) Eversole; and commissioned on 10 May 1946. The Eversole was one of the final three ships built in Tacoma by Todd-Pacific before closure of the Tacoma yard.

Kırkikievler railway station (Turkish: Kırkikievler istasyonu) was a railway station in İzmit, Turkey. It was serviced by the Adapazarı Express regional train service from Istanbul to Adapazarı. Located just south of the city center, the station was originally built in 1975 by the Turkish State Railways, when the Istanbul-Ankara railway was realigned to bypass İzmit's city center.Kırkikievler station was closed down on 1 February 2012 due to construction of the Ankara-Istanbul high-speed railway.

USS Gudgeon (SS/AGSS/SSAG-567), a Tang-class submarine, was the second ship of the United States Navy to be named for the gudgeon, a species of small fresh-water minnow.

The Battle of Bapheus occurred on 27 July 1302, between an Ottoman army under Osman I and a Byzantine army under George Mouzalon. The battle ended in a crucial Ottoman victory, cementing the Ottoman state and heralding the final capture of Byzantine Bithynia by the Ottomans.

After its foundation by Osman I in about 1299, the Ottoman Empire expanded across Bithynia in north-west Anatolia by capturing territory from the Byzantine Empire. Osman was succeeded by his son Orhan in about 1324 and, following long sieges, he took the important cities of Bursa (1326) and Nicaea (1331). Next, Orhan besieged Nicomedia from 1333 to 1337. The Byzantine garrison surrendered due to lack of food and resources. Orhan's victory sealed Ottoman control of Bithynia.

Kocaeli Museum, a.k.a. Kocaeli Archaeology and Ethnography Museum or İzmit Museum, Turkish: Kocaeli Müzesi) is a national museum in Kocaeli (İzmit), northwestern Turkey, exhibiting archaeological artifacts and ethnographic objects. It is housed in the former railway station of İzmit.The museum is situated on İstasyon St. in Kozlu neighborhood of İzmit.The railway station was designed by German architect Otto Ritter, and built between 1873 and 1910. The facility covers an area of 21 daa (5.2 acres). The railway station became defunct after the course of the railway, which ran along the coast of Marmara Sea and passed through the city center, was changed to run north of the city. After restoration works for redevelopment, which began in 2004, the former railway station was opened early 2007. The museum consists of 1,965 archaeological, 1,549 ethnographic objects and 5,155 coins. In addition to the exhibition halls, there is a 130-seated conference room and a laboratory. The museum objects are partly exhibited in the museum halls and partly open-air in the museum yard. A steam locomotive and two railroad cars, redesigned as cafeteria and restaurant and situated in front of the museum, serve the visitors.In the museum halls, artifacts from Paleolithic, Hellenic, Roman, Byzantine and Ottoman era are exhibited.

Kocaeli Bayan Futbol Kulübü, shortly Kocaeli Bayan FK, is a Turkish sole women's football sports club, based in İzmit city of Kocaeli. It was founded by Hasan Alemdaroğlu in 2016. Currently, they play in the Turkish Women's Second Football League. The club colors are green and black.The team finished the 2018–19 Women's Second League as runners-up, and was promoted to the Turkish Women's First Football League.

Kocaeli B.B. Ice Arena (Turkish: Kocaeli B.B. Olimpik Buz Sporları Salonu), formerly Kocaeli Ice Rink, is an indoor ice skating and ice hockey arena located at Şirintepe neighborhood of Izmit in Kocaeli Province, Turkey. It was opened in 1999 and has a seating capacity of 3,600 spectators.It was built according to International Ice Hockey Federation specifications, which are given in metric units (the Imperial units given are approximations): 61 m × 30 m (200 ft × 98 ft) with a corner radius of 8.5 m (28 ft). The arena is home to Kocaeli B.B. Kağıt Ice Hockey Men's team, which plays in the Turkish Ice Hockey Super League. Turkish Ice Hockey Women's League matches are also played in the arena, which hosts the women's ice hockey team of the same club.