Qazvin (; , , also Romanized as Qazvin, Caspin, Qazwin, or Ghazvin) is the largest city and capital of the Province of Qazvin in Iran. Qazvin was an ancient capital in the Persian Empire and nowadays is known as the calligraphy capital of Iran. It is famous for its Baghlava, carpet patterns, poets, political newspaper and pahlavi (Middle Persian) influence on its accent. At the 2011 census, its population was 381,598.