In this work eleven documents from the Archives of the Crown of Aragon and Protocolos of Barcelona, are transcribed. The first nine talk about the Kings John I and Martin I of Aragon and deal with some aspects in relation to the Nasri Realm of Granada. We have to point out the embassies of Abelhageg and Luce Laucomixa of Granada; the safe-conduct given to the Saracen Jacob who was an interpreter or "turcimanus" of the people from Cataluna, who lived in the realm of Granada; several repayments of captives and slaves; intercession of the King of Granada in favor of the "mudejares" of Aragon, sothat they could return to Mussulman lands. The document number eight has special interest, that is the peace of Martin I with Granada. The stwo last documents are about the conditions to preach the HolyCrusade against Granada (1484) with important details about the different kinds of preaching in Cataluna and the distribution of the sums obtained. The last document has the conditions of an insurance for the journey of a captive of Granada, by sea to Cataluna.