Deichman was born in Copenhagen, Denmark. He was the son of Carl Deichman (ca. 1639-1684) and his wife Else Pedersdatter (d. ca. 1675). He took his Baccalaureate in 1688. After theological exam in 1690, he studied in Frankfurt, Leiden and Utrecht. He first served as a chaplain with the Danish military auxiliaries. In 1697, he had secured a clerical position in Copenhagen. He served as Bishop of Viborg from 1700, and Bishop of the Diocese of Oslo from 1713 to 1730.
In 1699, he married Else Rosemeyer (ca. 1669-1745), daughter of Carl Rosemeyer (d. 1670) and his wife Anna Pedersdatter (d. 1679). They had six children, three sons and three daughters. Their son Carl Deichman (1705–1780) was an investor in Fossum Ironworks and later owner of Eidsfos Verk. Their daughter Margrethe Deichman (1708–1759) was married to Chancellor Herman Løvenskiold (1701-1759), a member of the noble Løvenskiold noble family who owned Borgestad Manor in Gjerpen.
- Godal, Anne Marit (ed.). "Bartholomæus Deichman". Store norske leksikon (in Norwegian). Oslo: Norsk nettleksikon. Retrieved 8 June 2012.
- Supphellen, Steinar. "Bartholomæus Deichman". In Helle, Knut. Norsk biografisk leksikon (in Norwegian). Oslo: Kunnskapsforlaget. Retrieved 8 June 2012.
- Eidsfoss jernverk (lokalhistoriewiki.no)
- Øystein Rian. "Herman Løvenskiold, Jernverkseier, Godseier, Kanselliråd". Norsk biografisk leksikon. Retrieved July 15, 2016.
- Jon Gunnar Arntzen. "Borgestad". Store norske leksikon. Retrieved July 15, 2016.
|Bishop of Oslo
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