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.
Arno Berg
Berg was the first head of the department for cultural heritage in Oslo, serving from 1956 to 1960. The preservation of Basarhallene at Oslo Cathedral, buildings in Homansbyen and Karl Johans gate, as well as the restoration of Oslo Ladegård and Akershus Fortress were all focuses of his attention. Among his publications are "Selskabet for Oslo Byes Vels historie 1811–1861" from 1936, "Vår Frelsers kirke " from 1950, and a two-volume work on Akershus Fortress. 
Arno Berg was an honorary member of several organizations and was invited to be a member of the Norwegian Academy of Science and Letters. He was awarded the Medal of St. Hallvard and was decorated Commander of the Order of St. Olav. Arno Bergs plass in Oslo was named in his honor. A bust of Arno Berg by sculptor Arnold Haukeland was unveiled at Oslo Ladegård in 1972.