The two volumes of "The Church and the Jews in the XIII Century" provide a presentation of scores of papal documents together with translations, notes, and a thorough introduction. This text of the first volume has served historians of the popes and the Jews for nearly fifty years as one repository of source materials for the important period 1198-1254. Solomon Grayzel concluded that until the nuances of papal teachings were understood through the insights gained from a continued revelation of new texts, the perception of papal policies toward the Jews would remain incomplete, and inaccurate. Thus he spent years collecting additional material. The format of the second volume (1254-1314) varies somewhat from that of the first volume; detailed summaries of the Latin texts are given rather than translations.