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 Police Museum
Oslo Police Museum () is a Police Museum in Oslo, Norway. The museum was established in 1902. Until 1973, it was known as the Criminal Museum ("Kriminalmuseet") . The museum documents the history of police work in the city of Oslo. The museum is housed at the Oslo Central police station "(Sentrum politistasjon") located at Hammersborggata 12 in the central Oslo neighborhood of St. Hanshaugen. Other police museum in Norway are maintained in Trondheim and Bergen.