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 Opera Ball
The balls have been period historical costume or masquerade balls and have been held in the historical Gamle Logen. The old Freemasons Lodge in Oslo was renovated in 1989, but housed similar events in Christiania throughout the 19th century attended by some of Norway's most famous composers and artists - such as Edvard Grieg, Halfdan Kjerulf, Johan Svendsen, etc. Participants have first attended an Opera performance at the national opera house, then walk in a costume or carnival procession with horse-drawn carts through the historical centre of Oslo to the historical former freemasons Lodge. Then follows parallel performances and dance in up to six different halls with several orchestras and groups of musicians. All participants are invited to two evenings of rehearsals in historical dances, such as the menuett, mazurka, francaise, lanciers, galopp and so forth. Lectures and information evenings inform about the period, culture and attires chosen as theme for the event.