the sanctity and holiness of Mecca, including its Great Mosque (Masjid al-Haram), in Islam. He performed the Hajj in 632 CE called the Hujjat ul-Wada' ("Farewell Pilgrimage") since Muhammad prophesied his impending death on this event. After Muhammad The Kaaba has been repaired and reconstructed many times. The structure was severely damaged by a fire on 3 Rabi' I 64 AH or Sunday, 31 October 683 CE, during the first siege of Mecca in the war between the Umayyads and 'Abdullah ibn al-Zubayr, an early Muslim who ruled Mecca for many years between the death of ʿAli and the consolidation of power by the Umayyads. 'Abdullah rebuilt it to include the hatīm. He did so on the basis of a tradition (found in several hadith collections) that the hatīm was a remnant of the foundations of the Abrahamic Kaaba, and that Muhammad himself had wished to rebuild it so as to include it. The Kaaba was bombarded with stones in the second siege of Mecca in 692, in which the Umayyad army was led by al-Hajjaj ibn Yusuf. The fall of the city and the death of 'Abdullah ibn al-Zubayr allowed the Umayyads under 'Abd al-Malik ibn Marwan to finally reunite all the Islamic possessions and end the long civil war. In 693 CE, 'Abd al-Malik had the remnants of al-Zubayr's Kaaba razed, and rebuilt it on the foundations set by the Quraysh. The Kaaba returned to the cube shape it had taken during Muhammad's time. During the Hajj of 930 CE, the Shi'ite Qarmatians attacked Mecca under Abu Tahir al-Jannabi, defiled the Zamzam Well with the bodies of pilgrims and stole the Black Stone, taking it to the oasis in Eastern Arabia known as al-Aḥsāʾ, where it remained until the Abbasids ransomed it in 952 CE. The basic shape and structure of the Kaaba have not changed since then. After heavy rains and flooding in 1626, the walls of the Kaaba collapsed and the Mosque was damaged. The same year, during the reign of Ottoman Emperor Murad IV, the Kaaba was rebuilt with granite stones from Mecca, and the Mosque was renovated. The Kaaba is depicted on the reverse of 500 Saudi riyal, and the 2000 Iranian rial banknotes. Architecture and interior The Kaaba is a cuboid-shaped structure made of stones. It is approximately tall (some claim ), with sides measuring . Inside the Kaaba, the floor is made