He appointed his nephew Antonio Pimentel de Prado as Spanish ambassador to Sweden, after several incognito trips to Stockholm to visit Queen Christina of Sweden, granddaughter of Gustav Vasa, the same who started Lutheran reform against the Catholic Church in Sweden and part of Denmark.
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.