Ardabil is an ancient city in Iranian Azerbaijan. Ardabil is the capital of Ardabil Province. At the 2011 census, its population was 564,365, in 156,324 families, where the dominant majority are ethnic Iranian Azerbaijanis and the primary language of the people is Azerbaijani. Ardabil is known for its trade in silk and carpets. Ardabil rugs are renowned and the ancient Ardabil Carpets are considered among the best of classical Persian carpets. Ardabil is also home to a World Heritage Site, the Ardabil Shrine, the sanctuary and tomb of Shaikh Safî ad-Dîn, eponymous founder of the Safavid dynasty.