The Islamic Holy Cities are significant locations for Muslims around the world. The three most important cities are Mecca, Medina, and Jerusalem. Mecca is home to the Kaaba, the most sacred site in Islam, where millions of Muslims perform the Hajj pilgrimage each year. Medina is where the Prophet Muhammad established the first Muslim community and is the site of his mosque, Al-Masjid an-Nabawi. Jerusalem holds the Al-Aqsa Mosque, which is considered the third holiest site in Islam. These cities play a central role in the spiritual life of Muslims.