Saudi Arabia (officially known as the Kingdom of Saudi Arabia), is the largest Arab state in Western Asia by land area (approximately 2,150,000 km2), constituting the bulk of the Arabian Peninsula, and the second-largest geographically in the Arab world. It is bordered by Jordan and Iraq to the north, Kuwait to the northeast, Qatar, Bahrain and the United Arab Emirates to the east, Oman to the southeast, and Yemen in the south. It is the only nation with both a Red Sea coast and a Persian Gulf coast and much of its terrain consists of inhospitable desert.
The area of modern-day Saudi Arabia formerly consisted of four distinct regions: Hejaz, Najd and parts of Eastern Arabia (Al-Ahsa) and Southern Arabia ('Asir). The Kingdom of Saudi Arabia was founded in 1932 by Ibn Saud. He united the four regions into a single state through a series of conquests beginning in 1902 with the capture of Riyadh, the ancestral home of his family, the House of Saud. The country has since been an absolute monarchy governed along Islamic lines. Wahhabi Islam has been called "the predominant feature of Saudi culture". Saudi Arabia is sometimes called "the Land of the Two Holy Mosques" in reference to Al-Masjid al-Haram (in Mecca), and Al-Masjid an-Nabawi (in Medina), the two holiest places in Islam. The Kingdom has a total population of 28.7 million, of which 20 million are Saudi nationals and 8 million foreigners.