Shiraz (/ʃiːˈrɑːz/; Persian: شیراز, Šīrāz, Persian pronunciation: [ʃiːˈrɒːz], pronunciation ) is the sixth most populous city of Iran and the capital of Fars Province (Old Persian as Pârsâ). At the 2011 census, the population of the city was 1,460,665 and its built-up area with Shahr-e Jadid-e Sadra was home to 1,500,644 inhabitants. Shiraz is located in the southwest of Iran on the Roodkhaneye Khoshk (Dry River) seasonal river. It has a moderate climate and has been a regional trade center for over a thousand years.