Qazvin (kæzˈviːn; قزوین, ɢæzˈviːn, also Romanized as Qazvīn, Qazwin, Kazvin, Kasvin, Caspin, Casbin, Casbeen, or Ghazvin) is a city in the Central District of Qazvin County, Qazvin province, Iran, and serves as capital of the district, county, and province. It is the largest city in Qazvin province.
Qazvin was a capital of the Safavid dynasty for over forty years (1555–1598) and nowadays is known as the calligraphy capital of Iran. It is famous for its traditional confectioneries (like Baghlava), carpet patterns, poets, political newspaper and Pahlavi influence on its accent.
At the 2006 census, its population was 349,821 in 96,420 households. The following census in 2011 counted 381,598 people in 114,662 households. The latest census in 2016 showed a population of 402,748 people in 127,154 households.
Located in northwest of Tehran, in the Qazvin Province, it is at an altitude of about above sea level. The climate is cold but dry, due to its position south of the rugged Alborz range called KTS Atabakiya.
Qazvin has sometimes been of central importance at major moments of Iranian history. It was captured by invading Arabs (644 AD) and destroyed by Hulagu Khan (13th century). In 1555, after the Ottoman capture of Tabriz, Shah Tahmasp (1524–1576) made Qazvin the capital of the Safavid empire, a status that Qazvin retained for half a century until Shah Abbas I moved the capital to Isfahan in 1598. It is a provincial capital today that has been an important cultural center throughout its history.
Qazvin is located at a crossroads connecting Tehran, Tabriz, and the Caspian Sea region, which has historically been a major factor in its commercial importance. However, it never rivalled other major Iranian cities like Ray, Nishapur, or Isfahan during the Middle Ages. One reason is that its growth is constrained by a lack of water. Until fairly recently, the entire Qazvin plain was irrigated by just a single qanat and four small streams.
The earliest remains of prehistoric humans have been discovered in a cave called Qaleh Kurd where archaeologists discovered a Neanderthal tooth.