The stone was venerated at the Kaaba in pre-Islamic pagan times. It was set intact into the Kaaba’s wall by the Islamic prophet Muhammad in the year 605 A.D., five years before his first revelation. Since then it has been broken into a number of fragments and is now cemented into a silver frame in the side of the Kaaba. Its physical appearance is that of a fragmented dark rock, polished smooth by the hands of millions of pilgrims. Islamic tradition holds that it fell from Heaven to show Adam and Eve where to build an altar. Although it has often been described as a meteorite, this hypothesis is now uncertain.