The Companion to Medieval Palermo offers a panorama of the history of Medieval Palermo from the sixth to the fifteenth century. Often described by contrast with the communal reality of Medieval Italy as submitted to a royal (external) authority, the city is here given back its density and creativity. Important themes such as artistic and literary productions, religious changes or political autonomy are thus explored anew. Some fields recently investigated are the object of particular scrutiny: the history of the Jews, Byzantine or Islamic Palermo are among them.