This is an edited version of an article that was originally published in聽The Encyclopaedia Iranica, 1985, available at聽.
Author
Dr Farhad Daftary
Co-Director and Head of the Department of Academic Research and Publications
An authority in Shi’i studies, with special reference to its Ismaili tradition, Dr. Daftary has published and lectured widely in these fields of Islamic studies. In 2011 a Festschrift entitled聽Fortresses of the Intellect聽was produced to honour Dr. Daftary by a number of his colleagues and peers.