Rijeka (/riˈɛkə, riˈeɪkə/ ree-EK-ə, ree-AY-kə, .mw-parser-output .IPA-label-small{font-size:85%}.mw-parser-output .references .IPA-label-small,.mw-parser-output .infobox .IPA-label-small,.mw-parser-output .navbox .IPA-label-small{font-size:100%}US also /riˈjɛkə/ ree-YEK-ə,[3][4] Croatian: [rijěːka] ⓘ; local Chakavian: Reka or Rika;[5] Slovene: Reka, Italian: Fiume (Italian: [ˈfjuːme] ⓘ; Fiuman: Fiume; Hungarian: Fiume; outdated German name: Sankt Veit am Pflaum), is the principal seaport and the third-largest city in Croatia (after Zagreb and Split). It is located in Primorje-Gorski Kotar County on Kvarner Bay, an inlet of the Adriatic Sea and in 2021 had a population of 108,622 inhabitants.[6] Historically, because of its strategic position and its excellent deep-water port, the city was fiercely contested, especially between the Holy Roman Empire, Italy and Croatia, changing rulers and demographics many times over centuries. According to the 2011 census data, the majority of its citizens are Croats, along with small numbers of Serbs, Bosniaks and Italians. Rijeka is the main city and county seat of the Primorje-Gorski Kotar County. The city's economy largely depends on shipbuilding (shipyards "3. Maj" and "Viktor Lenac Shipyard") and maritime transport. Rijeka hosts the Croatian National Theatre Ivan pl. Zajc, first built in 1765, as well as the University of Rijeka, founded in 1973 but with roots dating back to 1632 and the local Jesuit School of Theology.[7]