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.
St. Margaret's Church, Oslo
The church was built in the 13th century and is now a ruin. The church is named after Margaret of Antioch. It was located in Maridalen, close to the northern end of lake Maridalsvannet. Architect and archaeologist Gerhard Fischer led the restoration in 1934. Today it is the best preserved medieval building in Oslo next to the Old Aker Church. 
"The Maridal Play" ("Maridalsspillet") is a trilogy consisting of "Church Builder", "Black Death" and "Church Silver". It was written by Carl Fredrik Engelstad. The historical outdoor play is performed with the remains of Margaret's Church in Maridalen serving as a back ground. These and several other plays have been performed on site almost annually since 1974.