Kongsberg Church was constructed of brick and designed with a cruciform floor plan.

In 1928, Tinius Olsen gave a major donation to the restoration of the organ which had suffered water damage in the late 1880s.

The baptismal font was carved out of marble extracted from Holmestrand in Vestfold.

Among the driving forces behind the decoration and interior of the church was mining engineer Michael Heltzen.

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