St. Jacob's church was built in the 11th and 12th centuries outside the fortifications around Cathedral Hill, and was used by numerous Jacob pilgrims on their way to Santiago de Compostela. Initially, the church was modelled around Heinrich's cathedral and was constructed as a column basilica. In 1771 the baroque facade was added, behind which numerous components from the romanesque period can still be discovered. Inside it is impossible to overlook the many romanesque elements.
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The Royal Palace was built in the first half of the 19th century as the Norwegian residence of King Charles III, who also reigned as king of Sweden and otherwise resided there, and is the official residence of the present Norwegian monarch. The crown prince resides at Skaugum in Asker west of Oslo. The palace has 173 rooms.
Until the completion of the Royal Palace, Norwegian royalty resided in Paleet, the magnificent town house in Christiania that the wealthy merchant Bernt Anker bequeathed to the State in 1805 to be used as a royal residence. During the last years of the union with Denmark it was used by the viceroys of Norway, and in 1814 by the first king of independent Norway, Christian Frederick.