Yerevan sometimes written as Erevan; former names include Erebuni and Erivan) is the largest city and capital of Armenia. It is situated on the Hrazdan River, and is the administrative, cultural, and industrial center of the country. The history of Yerevan dates back to the 8th century BC, with the founding of the Urartian fortress of Erebuni in 782 BC. Eventually, the name Erebuni evolved in the Armenian language in the 5th or 4th century BC, with the letter "b" in the name, for example, becoming "v".