The primary religion in Saudi Arabia is Islam. Islam was founded in the 7th century CE, and Muhammad, considered the final prophet, was born in Mecca, which is a central religious site in Islam. The country is predominantly Sunni Muslim, and the practice of Islam significantly influences daily life, laws, and customs. The Quran and the Hadiths guide Muslim worship and behavior. Saudi Arabia is also home to the two holiest cities in Islam, Mecca and Medina, attracting millions of pilgrims each year during the Hajj and throughout the year.