Frants Berg

{{Short description|Bishop of Oslo 1548–1580}}

{{Use dmy dates|date=February 2025}}

{{Infobox Christian leader

| name = Frants Berg

| image = Bishop Frants Berg.png

| caption = Bishop Frants Berg

| birth_name =

| birth_date = 1504

| birth_place = Odense, Denmark

| death_date = {{Death date and age |1591|11|2|1504|df=y}}

| death_place = Oslo, Norway

| monuments =

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| nationality = Danish

| other_names =

| education =

| alma_mater = Odense University
University of Rostock

| occupation = Bishop of the Diocese of Oslo

| years_active =

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| religion = Lutheran

| spouse =Karine Lauridsdatter
(ca. 1515-1570)

| partner =

| children =

| parents = Claus Berg
Margrethe de Groth

| relatives =

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}}

Frants Berg (1504 – 2 November 1591) was a Danish clergyman who served as the Bishop of Oslo.{{cite encyclopedia|title=Frants Berg|encyclopedia=Store norske leksikon|editor-last=Godal|editor-first=Anne Marit|editor-link=Anne Marit Godal|publisher=Norsk nettleksikon|location=Oslo|url=http://www.snl.no/Frants_Berg|language=Norwegian|access-date=10 June 2012}}

He was born in Odense, Denmark. He was the son Claus Berg (ca. 1470 – ca. 1532) and his wife Margrethe de Groth. His father was a German born sculptor and painter who was engaged by John, King of Denmark and whose decorative work appeared in Danish churches. Queen Christina of Saxony (1461–1521), consort of King John, was his godmother. Queen Christine paid for his education, first at Odense University and later at the University of Rostock.{{cite web|url=http://denstoredanske.dk/Dansk_Biografisk_Leksikon/Kirke_og_tro/Biskop/Frants_Berg|title=Frants Berg|publisher=Den Store Danske|access-date=15 July 2016}}

In 1531, he was rector in Odense, in 1540 he was vicar at Ribe Cathedral and in 1546 of St. Nicholas' Church in Copenhagen. The Protestant Reformation in Denmark and Norway was introduced in 1537 when King Christian III of Denmark declared Lutheranism as the official religion. Berg played a key role in the conversion of the Church of Norway. In 1548, he was promoted to superintendent in Oslo and Hamar. He served as Bishop of the Diocese of Oslo from 1548 to 1580.{{cite encyclopedia|title=Frants Berg|encyclopedia=Norsk biografisk leksikon|first=Bernt|last=Oftestad|editor=Helle, Knut|publisher=Kunnskapsforlaget|location=Oslo|url=http://www.snl.no/.nbl_biografi/Frants_Berg/utdypning|language=Norwegian|access-date=10 June 2012}}

After his retirement he resided in Oslo, where he died in 1591.