 Rebolledo received from Denmark the mission to negotiate with Sweden a Peace treaty to finish the war.He appointed his nephew Antonio Pimentel de Prado as Spanish ambassador to Sweden, who succeeded to build up a confident relation with Queen Christina of Sweden, who did not want to marry, but wanted to abdicate and become a catholic.Christina was the granddaughter of Gustav Vasa, the same who started Lutheran reform against the Catholic Church in Sweden and part of Denmark.