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
In 1624, all of old Oslo burnt to the ground. King Christian IV decided that the city should not be rebuilt at the same location and instead be built to the north of Akershus Fortress. The new city had wide streets at right angles. Building space for a town hall was made available between "Rådhusgaten" and "Øvre Slottsgate". What is today referred to as the old City Hall ("Gamle rådhus") was finished in 1641. The building still exists at Nedre Slottsgate 1. The building fell into decay and by 1733 a building at "Rådhusgaten 7" was selected to be a new City Hall.