Masjid al-Haram, also known as the Sacred Mosque or the Great Mosque of Mecca, is a mosque in Mecca, Saudi Arabia, serving as the holiest and most important mosque in Islam. It encloses the vicinity of the Kaaba in Mecca, in the western region of the country. It is among the pilgrimage sites associated with the Hajj, which every Muslim must perform at least once in their lives if able. It is also the main site for the performance of ʿUmrah, the lesser pilgrimage that can be undertaken any time of the year. The rites of both pilgrimages include circumambulating the Kaaba within the mosque. The Great Mosque contains other important sites, such as the Black Stone, the Zamzam Well, Maqam Ibrahim, and the hills of Safa and Marwa.