The Kaba is a sacred structure located in the center of the Masjid al-Haram in Mecca, Saudi Arabia. It is a cube-shaped building made of granite and is covered with a black silk cloth known as the Kiswah. The Kaba is considered the most sacred site in Islam and is the qibla, or direction, that Muslims face during their prayers. Every year, millions of Muslims visit the Kaba as part of the Hajj pilgrimage, which is one of the Five Pillars of Islam. The Kaba is believed to have been built by the Prophet Ibrahim (Abraham) and his son Ismail (Ishmael) as a house of worship. Its significance in Islamic tradition makes it a focal point for devotion and unity among Muslims worldwide.