Kaʿba (Arabic: الکعبة) is a cube-shaped building inside al-Masjid al-Haram, Mecca. It is the most important place of worship in Islam and the qibla of Muslims. Muslims turn their face to it from any part of the world when they say their prayers. Doing tawaf (circumambulation) around it is a part of hajj rituals.
The word "Ka'ba" literally means a cube-shaped construction, and this is why the building has been called "Ka'ba".
Ka'ba is also known as "Bayt Allah" (Arabic:بیت الله, the house of God). In the Qur'an, the Ka'ba has been also mentioned as "al-Bayt" (Arabic: البیت, the house), "al-Bayt al-Haram" (Arabic: البیت الحرام, the sacred house), "al-Bayt al-'Atiq" (Arabic: البیت العتیق, the old house), and "al-Bayt al-Muharram" (Arabic: البیت المحرم, the respected house). The mosque encompassing the Ka'ba is called al-Masjid al-Haram. According to some reports, in ancient times, the Ka'ba was also called "al-Qadis" (Arabic: القادس, the Holy), and "al-Nadhir" (Arabic: الناذر, the Warner).