Old Aker Church
Old Aker Church was built as a three-naved Romanesque style basilica and constructed from limestone. It is believed to have been erected by King Olav Kyrre in 1080 as a church for all of Vingulmark, the historic area surrounding Oslo. The grounds of Old Aker Church were originally likely the former site of the regional thing during the pre-Christian period.
Oslo City Hall
The idea of building a new city hall in Pipervia was first suggested by Oscar Hoff (an architect) in 1906, but nothing came of the plans. In 1915, the idea was taken up by Hieronymus Heyerdahl, who had just stood down as mayor. He noticed the city's lack of a representative city hall to receive the municipality's guests during the 1914 Jubilee Exhibition in Frogner. He set up an architectural competition which received a total of 44 entries in the first of two rounds. In 1918 Arnstein Arneberg and Magnus Poulsson were selected as winners, whose project was clearly inspired by Stockholm City Hall. A continuned lack of funds meant that construction had to wait, and in the intervening years the architects made several changes to the project. In 1930 they present their final draft, which had undergone significant changes, influenced by functionalism. The most apparent change was the addition of two office towers.