  Ibn Ezra’s impact was swift and powerful. In the various communities through which he sojourned, the Arabic learning which he was able to present in consumable form was widely read. As a cultural mediator, particularly of astronomy and astrology, his contributions to Christian civilization were no less remarkable than those to his coreligionists. (See, in particular, Burnett 1997.) Indeed, Ibn Ezra may well be the most important cultural broker of the medieval period. His writings in astrology, arithmetic, Hebrew grammar and poetics, and Jewish thought all fall far short of the highest achievements set by Judaeo-Arabic culture in al-Andalus. Yet no one succeeded more than Ibn Ezra in spreading the fruits of this culture so widely and deeply.