<Li> Laylat al - Qadr, anniversary of the night of the revelation of the Quran . </Li> <Li> Eid al - Mubahila celebrates a meeting between the Ahl al - Bayt (household of Muhammad) and a Christian deputation from Najran . Al - Mubahila is held on the 24th of Dhu al - Hijjah . </Li> <P> The four holiest sites to Muslims are Mecca (Al - Haram Mosque), Medina (Al - Nabbawi Mosque), Jerusalem (Al - Aqsa Mosque), and Kufa (Kufa Mosque). In addition for Shias, the Imam Husayn Shrine, Al Abbas Mosque in Karbala, and Imam Ali Mosque in Najaf are also highly revered . </P> <P> Other venerated sites include Wadi - us - Salaam cemetery in Najaf, Al - Baqi' cemetery in Medina, Imam Reza shrine in Mashhad, Kadhimiya Mosque in Kadhimiya, Al - Askari Mosque in Samarra, Sahla Mosque and Great Mosque of Kufa in Kufa and several other sites in the cities of Qom, Susa and Damascus . </P>

What is the central city of shiite islam
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