There has been a diocese centred upon the historic city of Västerås in Sweden since the Middle Ages, well before the Reformation. The first bishop of Västerås has been considered to be David of Munktorp (died 1082) but the sources claiming that are all of late medieval origin and are disputed. Västerås had several bishops during the 12th century but they are all unknown by name. Bishops of Västerås before and during the Reformation Robertus 1219–1225 Magnus 1232–1258 Carolus 1258–1283 Petrus 1284–1299 Öiarus 1299 Haquinus 1299–1300 Nicolaus Catilli 1300–1308 Israel Erlandi 1309–1328 Egislus Birgeri 1329–1352 Magnus Augustini 1353–1369 Laurentius Boberg 1370 Mathias Laurentii 1371–1379 Hartlevus Hartlevi 1379–1383 Beno Henrici Korp 1383–1394 Nicolaus 1395–1403 Andreas Johannis 1403 Petrus Ingevasti 1403–1414 Ingemarus Ingevaldi 1414 Nafno Johannis Gyrstinge 1414–1421 Olaus Jacobi Knob 1421–1442 Achatius Johannis 1442–1453 Petrus Mathiae de Vallibus 1453–1454 Olaus Gunnari 1454–1461 Benedictus Magni 1461–1462 Birgerus Magni 1462–1464 Ludechinus Abelis 1465–1487 Olaus Andreae de Vallibus 1487–1501 Otto Olavi (Svinhufvud) 1501–1522 Petrus Jacobi Guti (Sunnanväder) 1523 Bishops of Västerås during and after the Reformation Petrus Magni / Peder Månsson 1524–1534 Henricus Johannis 1534–1556 Peder Swart (Petrus Andreae Niger) 1557–1562 Johannes Nicolai Ofeegh 1562–1574 Erasmus Nicolai Arbogensis 1574–1580 Petrus Benedicti Ölandus 1583–1588 Olaus Stephani Bellinus 1589–1606 Nicolaus Petri 1606 Olaus Stephani Bellinus 1608–1618 Johannes Johannis Rudbeckius 1619–1646 Olavus Laurentii Laurelius 1647–1670 Nicolaus Johannis Rudbeckius 1670–1676 Johannes Petri Brodinus 1677–1680 Carolus Carlson 1680–1708 Petrus Malmberg 1708–1710 Matthias Iser 1711–1725 Sven Cameen 1725–1729 Nils Barchius 1731–1733 Andreas Kallsenius 1733–1750 Samuel Troilius 1751–1760 Lars Benzelstierna 1760–1800 Johan Gustaf Flodin 1800–1808 Eric Waller 1809–1811 Gustaf Murray 1811–1825 Sven Wijkman Casparsson 1829–1839 Gustaf Nibelius 1839–1849 Christian Fahlcrantz 1849–1866 Carl Olof Björling 1866–1884 Gottfrid Billing 1884–1898 Johan August Ekman 1898–1900 Nils Lövgren 1900–1920 Einar Billing 1920–1939 Johan Cullberg 1940–1962 Sven Silén 1962–1975 Arne Palmqvist 1975–1988 Claes-Bertil Ytterberg 1988–2008 Thomas Söderberg 2008-2015 Mikael Mogren 2015- References Bishops of the Diocese of Västerås. Svenska kyrkan.