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.
Oslo Cathedral
Restoration was completed at the time of the city's 900 anniversary in 1950. The church was restored under the plans of architect Arnstein Arneberg. The neo-Gothic interior was removed and the original furnishings brought back. Arneberg also designed the chapel on the south side of the church. The church was closed in August 2006 for renovation and was opened in April 2010 in the presence of Harald V of Norway and the Norwegian royal family.The cathedral's first organ was built in 1711 by Carl Gustav Luckvitz, while the current main organ was built by Jan Ryde in 1997 for the 300-year anniversary. The two smaller organs in the cathedral were also built by Ryde og Berg Orgelbyggeri.In 1924 Oslo Cathedral received a donation of 24,000 NOK for a carillon in the belfry, but this was never implemented. In 2003 a second donation, by Ørnulf Myklestad, resulted in a 48-bell concert Carillon under the direction of carilloneur Vegar Sandholt. This carillon is inside the tower not the belfry, and the acoustical problems arising this location have been highlighted a 2005 masters thesis by Laura Rueslåtten.