dome over a rectangular base. Notable examples In Iraq The Imam Husayn Shrine in Karbala, Iraq draws Shia pilgrims from Iraq, Iran and elsewhere. The Sardāb of Caliph al-Mahdi ( 775–785) is preserved in Samarra, Iraq under a golden dome that was presented by Naser al-Din Shah Qajar and that was completed by Mozaffar ad-Din Shah Qajar in 1905. The tomb lies within the Al-Askari Mosque, one of the most important of Shia shrines. The mosque was badly damaged in a February 2006 bombing, presumably the work of Sunni militants. In Iran As of 2007, the Imam Reza shrine in Mashhad, Iran attracted 12 million visitors annually, second only to Mecca as a destination for Muslim pilgrims. This shrine is known for its healing powers. The shrine of Princess Shahrbanu, just south of Tehran, is open only to women. Shahrbanu was the daughter of Yazdegerd III, the last Sassanid ruler of Persia. She married Imam Hussein ibn Ali and was mother of the fourth Shia imam, Ali ibn al-Husayn, so has come to symbolize the early and close connection between Shiism and Iran. The shrine is popular with women seeking solace or assistance. In Syria The Sayyidah Zaynab Mosque, which holds the shrine of Zaynab bint Ali in Damascus, has been restored with the help of contributions from Shias from India, Pakistan, Iran and elsewhere. The shrine is one of the most important Shia sites in Syria, and draws many pilgrims from Iraq, Lebanon and Iran. In September 2008 a car bomb was detonated outside the shrine, killing 17. In Aleppo, the Mashhad al-Husayn from the Ayyubid period is the most important of Syrian medieval buildings. The shrine of al-Husayn was built on a place indicated to a shepherd by a holy man who appeared to him in a dream, and was built by members of the local Shia community. The present building is a reconstruction: the original suffered severe damage in 1918 from a huge explosion, and for forty years lay in ruins. The original restoration largely succeeded in restoring the mashhad to its former appearance. Later additions included covering the courtyard with a steel frame canopy and adding a brightly decorated "shrine", which have given the monument a very different character from the original. In Egypt In Egypt, many mashhads devoted to religious figures were built in Fatimid Cairo, mostly straightforward square structures with a dome. A few