"Dominicus Gundissalinus was both a philosopher and a translator; he was active in the unique context of Toledo in the second half of the twelfth century, a cultural melting pot of Muslims, Jews, and Christians. While he was philosophically trained in the Latin tradition, he found answers to the philosophical problems originating from that Latin training in the Arabic tradition of authors and texts which he himself translated. Outside the boundaries of specialised knowledge and research, this intriguing thinker is unknown; this study contributes to the re-discovery of Gundissalinus, with a philosophical and historical analysis of his metaphysical reflection in order to display its profound originality and pioneering contribution to the course of medieval philosophy."--