Magnus, Olaus a Swedish prelate, brother of the preceding, was born at Linkoping, near the close of the 15th century; was provost of the church at Stregnes when Gustavus I sent him to Rome to secure the papal confirmation to the appointment of his brother John to the archiepiscopal see of Upsal. It is not exactly known when Olaus returned to Sweden, but it is certain that after 1527 he was constantly with his brother as his secretary. After John's decease Olaus was appointed by the pope to succeed to the archbishopric of Upsal, but the Reformation had in the meanwhile changed the ecclesiastical relations in Sweden, and he never filled the archiepiscopal chair. He attended the Council of Trent by order of pope Paul III. Hence the mistake on the part of some writers of making John Magnus a member of the "ridentine gatherings, hich took place two years after his decease (1544). Olaus returned to Rome from Trent, and died there in 1568. His works, which are of minor interest, are given in Hoefer, Nouv. Biog. Generale, 32:734.