Edvard and Nina Grieg learned about Unitarianism in Birmingham (UK) in 1888 and accepted the Unitarian faith. Edvard was never member of any Unitarian church. Nina became member of the Danish Unitarian church.

Hans Tambs Lyche introduced the Unitarianism of Parker and Emerson to Norway and founded the first Norwegian Unitarian periodical, "Free Words".

Kristofer Janson, a Channing Unitarian, established the first Norwegian Unitarian Church (The Church of Brotherhood) in 1895 and became it's first pastor.

Herman Haugerud was the second and last pastor of The Church of Brotherhood, renamed Unitarian Society (c. 1900). This church ceased to exist 1937.

1892 and 1893 the Norwegian Unitarian ministers Hans Tambs Lyche and Kristofer Janson returned from America and at once started independently of each other to introduce Unitarianism.

In 1894 Tambs Lyche failed to organize a Unitarian Church in Oslo (then Kristiania) but managed to publish Norway’s first Unitarian periodical (Free Words).

In January 1895 Kristofer Janson founded The Church of Brotherhood in Oslo which was to be the first Unitarian church – where he stayed as the congregation’s pastor only for 3 years.

In 1904 Herman Haugerud was to return to Norway from America and to become the last Unitarian pastor to The Unitarian Society (which The Church of Brotherhood now was renamed). Pastor Haugerud died in 1937 and the Unitarian church ceased to exist shortly thereafter.

Between 1986 to 2003 different Unitarian groups were active in Oslo. In 2004 these merged into The Unitarian Association which registered as a religious society April 20 2005 under the name The Unitarian Association (The Norwegian Unitarian Church). Later “Bét Dávid” has been added to the name: The Bét Dávid Unitarian Association (The Norwegian Unitarian Church)