Otto (1501–1522) completed the Västerås Cathedral. Peder Sunnanväder (1522–1523), formerly chancellor to Sten Sture the Elder, was executed for alleged treason in 1527. The last Catholic bishop, Petrus Magni (1524–1534), is supposed to have been consecrated 1 May 1524 in Rome. In 1527 a Diet was held at Västerås which Protestantized the Church of Sweden and separated it from the Holy See in Rome. Petrus Magni consecrated various bishops in 1528 and 1531 under protest. Though subjected latterly to humiliating tutelage by King Gustav I of Sweden, he retained the see until his death. The Dalecarlians rose repeatedly in defence of their religion, but were overcome by the cunning and violence of Gustav I.
The cathedral of Västerås and the parish church of Mora were the only important churches in the diocese. At Västerås there was a Dominican convent (founded 1234) and a Hospital of the Holy Spirit (founded 1345). Munktorp Abbey [Wikidata] was extinct before 1318. The CistercianAbbey of Husby [Wikidata] (Gudsberga kloster, Mons Domini) in Dalecarlia, founded in 1477, and colonized from Alvastra Abbey in 1486, lasted until 1544.
Gallery
Gustaf Vasa accuses Peder Sunnanväder before the chapter in Västerås; Ernst Josephson
Peder Sunnanväder's and Mäster Knut's Ignominious Entry into Stockholm 1526; Carl Gustaf Hellqvist