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.
Waldemar Hansteen
He is most associated with his work on Tostrup Yard ("Tostrupgården"), a business premises on Karl Johans Gate in Oslo. The structure was designed by architects Christian Fürst, Torolf Prytz, and Waldemar Hansteen and built between 1896-1898. The five story building was one of the oldest in Norway with load-bearing structures in steel. It was also among the first to have an elevator and use electric lighting.