The Trinity Church (Trefoldighetskirken) is one of the largest churches in Oslo (1000 seats). The church itself is in the raw red brick, while the vaults, arches and small columns have gray scale color. The nave is octagonal with a Greek cross superimposed, with the choir in the apse, shallow transept and rectangular entrance flanked by two slender, octagonal bell towers. A central dome rises above the church.
The Trinity Church was consecrated in 1858 by Bishop Jens Lauritz Arup. The church has a neo-Gothic central plant, with two towers and eight-sided dome, and was designed by architect Alexis de Chateauneuf (Hamburg, Germany), but some time after the work was entrusted to his pupil Wilhelm von Hanno, who made some modifications to the original plans and put his personal stamp on the details of interior decoration. The main body (1872) is the work of Claus Jensen, the altarpiece (1866) is a painting by Adolph Tidemand (the Baptism of Jesus), chandeliers were designed by Emanuel Vigeland in 1923, and Frøydis Haavardsholm was the designer of the stained glass windows.
References:Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.