This volume presents a systematic and detailed elaboration of the halakhic (legal) decisions written by five of the most important authors who wrote responsa concerning conversos between the years 1391 and 1492. The expulsion was an event that radically changed the perspectives of the Iberian conversos. The halakhic authorities were confronted with an absolutely new situation, in which they had to reformulate their position towards the conversos. This volume presents all the responsa written in connection with conversos by Isaac b. Sheshet Perfet, Simeon b. ?ema? Duran and his descendants: Solomon b. Simeon Duran, ?ema? b. Solomon Duran and Simeon b. Solomon Duran.