St. Hanshaugen
To the southeast of the park is Oslo’s oldest building – Aker Kirke, built around 1100, but restored from ruins around 1860, and then again in the 1950s in a more authentic style. Next to the church is the cemetery Vår Frelsers gravlund, created in 1808 as a result of the great famine and cholera epidemic of the Napoleonic Wars. The nearby area around Damstredet and Telthusbakken is interesting since it retains the small town character of Oslo in the first part of the 19th century.
Calmeyer Street Mission House
The Calmeyer Street Mission House () was a building located at "Calmeyers gate" no. 1 in Oslo, Norway. The building served as a religious assembly house for Lutheran gatherings in the Oslo neighborhood around "Hausmanns gate" (Hausmann Street). 
Calmeyer Street Mission House was a Gothic Revival structure designed by the architect Henrik Nissen. Educator and businessman Otto Treider was largely responsible for the mission house being built in 1891. At the time, it contained Scandinavia's largest assembly hall, capable of accommodating over 5,000 people.