Saudi Arabia is an Islamic monarchy located in Western Asia. It has a population of 26.6 million and its capital and largest city is Riyadh. Saudi Arabia provides free healthcare to all citizens and is rooted in Islamic traditions, with highlights including Ramadan and the Hajj pilgrimage. The country has a free market economy largely based on oil exports and has undertaken efforts to diversify its economy in recent decades. Mecca is the holiest city in Islam and hosts the annual Hajj pilgrimage, which is one of the five pillars of Islam. The education system is also influenced by Islam, with free education from kindergarten through university in gender-segregated schools and universities.