It is now 12 years since the first volume of The Idea of Iran was published. Since that time the symposia have become a landmark event in the academic calendar and the published proceedings a popular contribution to academic work on Iran.

The publication of the series is due to the generosity of the Soudavar Memorial Foundation and its continued support year after year. We are particularly grateful to Mrs Soudavar-Farmanfarmaian for her interest and advice and for helping to ensure the success of the series. We thank Edmund Herzig for convening the symposium in February 2013 entitled ‘The Idea of Iran: From Seljugq Collapse to Mongol Conquest’ on which this volume is based. It has taken some time to produce and the editors would like to thank the authors for their patience and for producing such excellent contributions.