Al-Kāżimayn is regarded as a holy city in Shī‘ah Islām. It received its name (lit. "the Two Kāżims" or "the Two who swallow their anger"), for the two Shī‘ah Imāms buried there: Mūsā al-Kādhim and his grandson and successor Shī‘ah Imām Muhammad at-Taqī. A shrine was first built over their tombs, and subsequently the al-Kadhimiya Mosque. The area that now constitutes al-Kāżimiyyah was originally the location of a graveyard reserved for members of the Quraish tribe. This land was set aside for this purpose by the Abbasid caliph, Harun al-Rashid.