Old Aker Church
The church was built over the former site of the Akerberg mines ("Akersberg gruve"), an ancient silver mine which was in use since the early Viking era. The mines are mentioned in the 1170 "Historia Norvegiae". The existence of these former mines must have been the inspiration for a number of local stories about the church having hidden silver treasures and even dungeons with dragons.
Old Aker Cemetery () is the cemetery of Old Aker Church. Like the church, the cemetery dates back to the Middle Ages. The cemetery is located adjacent to the newer Cemetery of Our Saviour, which was established in 1808. Several notable people are interred in the cemetery.
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.