This duty is to be performed once in a lifetime having that one has the health conditions and financial means to do so. Over the last 1,400 years, the Islamic miracle of real brotherhood of all races and nations has been seen in action as Muslims gather for pilgrimage, Hajj, annually in the sacred city of Mecca where the House of Allah, the Ka'bah, is located.
As the only pilgrimage site and the direction to be faced for the five daily prayers, the Ka'bah, an ancient cubic shaped building dating from Abraham's time, is now circumambulated by around three million Muslims each year, all in white gowns, during the Hajj period.