Riyadh (/rɨˈjɑːd/; Arabic: الرياض ar-Riyāḍ Najdi pronunciation: [er.rɪˈjɑːdˤ], is the capital and largest city of Saudi Arabia. It is also the capital of Riyadh Province, and belongs to the historical regions of Najd and Al-Yamama. It is situated in the center of the Arabian Peninsula on a large plateau, and is home to 5.7 million people, and the urban centre of a region with a population of close to 7.3 million people.
The city is divided into 15 municipal districts, managed by Riyadh Municipality headed by the mayor of Riyadh, and the Riyadh Development Authority, chaired by the governor of Riyadh Province, Faisal bin Bandar Al Saud. The current mayor of Riyadh is Abdullah bin Abdulrahman Almogbel, appointed in 2012. Riyadh has the largest all-female university in the world, the Princess Nora bint Abdul Rahman University. It has been designated a global city.
During the Pre-Islamic era the city at the site was called Hajr (Arabic: حجر), and was reportedly founded by the tribe of Banu Hanifa. Hajr served as the capital of the province of Al Yamamah, whose governors were responsible for most of central and eastern Arabia during the Umayyad and Abbasid eras. Al-Yamamah broke away from the Abbasid Empire in 866 and the area fell under the rule of the Ukhaydhirites, who moved the capital from Hajr to nearby Al Kharj. The city then went into a long period of decline. In the 14th century, North African traveller Ibn Battuta wrote of his visit to Hajr, describing it as "the main city of Al-Yamamah, and its name is Hajr". Ibn Battuta goes on to describe it as a city of canals and trees with most of its inhabitants belonging to Bani Hanifa, and reports that he continued on with their leader to Mecca to perform the Hajj.