The Church of the Holy Trinity (Heliga Trefaldighets Kyrka) was built in the 13th century; the earliest plans were of a monastery for an order of Franciscan monks which had settled in Arboga. Early in the 16th century Gustav Vasa started Reformation in Sweden and the monastery was opened as a church for the people of Arboga.
During renovations in the 17th century a church tower was added to the building. Among the artifacts of the church is the pulpit from 1736, beautifully carved by the royal sculptor Buchard Precht. The light fittings in brass are believed to be the largest in Sweden, possibly the whole of Scandinavia. 13th century murals are displayed on the south wall, including a depiction of the life of Saint Francis.
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.