Østerdalen

Sentrum, meaning city-centre, is located on the southeast side of Oslo near the inner Oslofjord. The district is dominated by high rises like Postgirobygget and The Plaza. Oslo's Central Station is located on the eastern side of the borough. Sentrum consists of Bjørvika which has a history as Oslo's main harbour. The area is now being rebuilt with modern high rises consisting of the Barcode and also several student apartments, schools and museums. Sentrum is not a borough with an administration. It is partially administrated by St. Hanshaugen, and in part directly by the city council. The borough St. Hanshaugen takes care of health and social services.

Oslo City Hall (Norwegian: Oslo rådhus) is a municipal building in Oslo, the capital of Norway. It houses the city council, the city's administration and various other municipal organisations. The building as it stands today was constructed between 1931 and 1950, with an interruption during the Second World War. It was designed by architects Arnstein Arneberg and Magnus Poulsson. The building is located in the city center, in the northern part of the Pipervika neighbourhood, and it faces Oslofjord. Oslo City Hall is built of red brick and has two towers, one 63 meters tall and other 66 meters tall. The bricks used are larger than what was typical at the time of construction, but are roughly the same size as bricks used in the Middle Ages. The bricks, measuring approximately 27.5 × 13 × 8.5 cm, were produced by Hovin Teglverk in Oslo. The eastern tower has a carillon set of 49 bells. Various events and ceremonies take place in the building, notably the Nobel Peace Prize ceremony, which takes place every December.

Rådhusplassen ("The City Hall Square") is a square located between Oslo City Hall and the Oslofjord in Vika, Oslo, Norway. Previously used as a road and part of European route E18, it has since 1994 served as a recreational area. North of the square stands the city hall, to the south the fjord, to the east Akershus Fortress and to the east the former Western Railway Station.

Theatre Moderne was a music-hall theatre in Kristiania, Norway. It was established by Benno Singer in 1914, and closed in 1925. The stage was located in Tivolihaven. Among the actors were August Schønemann, who had his breakthrough at this theatre, and Signe Heide Steen.

Vika is a neighborhood in the Oslo city center in Norway. It is located between the Royal Palace, Oslo, Oslofjord, Aker Brygge, Pipervika, Slottsparken, Oslo City Hall, Oslo Concert Hall and borders on the north with Karl Johans gate, the main street of the city of Oslo which hosts Norwegian Parliament Building as well as known for being the hub to major Scandinavian brands, bars and hotels including Grand Hotel, the annual venue of the winner of Nobel Peace Prize and various state dignitaries. Vika is home to historical architectural monuments such as Victoria Terrasse. The new building for Norway's National Museum of Art, Architecture and Design, which is the largest art museum in the Nordic region and host to exclusive collection of world renowned artists such as Edvard Munch, is in the same vicinity. Vika falls within Frogner administrative district of Oslo which is deemed as one of city's most expensive, upscale and exclusive neighborhood with a handful of period properties. Over the years, several residential properties have been occupied by various embassies, high end restaurants and art galleries. The area is dominated by public institutions, such as the Norwegian Ministry of Foreign Affairs, Oslo City Hall and the Embassy of the United States in Oslo. There are also a number of cultural institutions, such as the Nobel Peace Center and Oslo Concert Hall while the National Theatre (Oslo) is also within a short walking distance . Vika was also the location of the former Western Railway Station. The Vika Line of the Oslo Tramway runs through the area.

Secondteatret, or Sekondteatret, was a theatre and theatre academy established in Kristiana in 1899 by Ludovica Levy and her husband Dore Lavik. Its opening performance was an adaptation of Schiller's play Mary Stuart on 25 August 1899. The theatre closed in 1901. The building was located on the site of the old Tivoli theatre in central Oslo.

Hotel Christiania Teater – is a historic Oslo city hotel and landmark built in 1918, known primarily for the notability of its theater inside the hotel and recently its unique hotel design by Annemone Wille Waage. The 102-unit hotel is located in Stortingsgata 16, next to Spikersuppa and the main pedestrian street Karl Johans gate with the Royal Palace on one side and the parliament on the other side, around the corner of the building is the Oslo City Hall and just in front of the building the National Theatre. The building has been on the National Register of Historic Places since 2015.

Kontraskjæret is a tram stop on the Vika Line. The station opened in 1995 as the name Rådhusplassen; From 2015, the station has closed due to maintenance works on the Vika Line and opened again with the name Kontraskjæret. The station is close to Rådhusbrygge 1 (Aker Brygge platf. F)

Pipervika is a neighborhood in the borough Sentrum in Oslo, Norway. It is located between the Oslofjord, Akershus Fortress and The City Hall Square. Today the term Pipervika is primarily used for the bay between the fortress and Aker Brygge. This was formerly commonly known as Piperviksbukta. It is part of the Fjord City urban renewal project.

Chat Noir (French for 'black cat') is a cabaret and revue theatre in Oslo, Norway. It was established in 1912 by Bokken Lasson. The current director is Tom Sterri.

Oslo West Station (Norwegian: Oslo Vestbanestasjon) or Oslo V, is a former railway station located in Vika in Oslo, Norway. It was the terminus of the Drammen Line between 1872 and 1980, until the Oslo Tunnel opened. The station remained in use until 1989, when all traffic was moved to the new Oslo Central Station. Until its closure it was the main station for trains on the Sørland Line, the Drammen Line and the Vestfold Line. There was no passenger rail connection to Oslo Ø, the eastern station that served the eastern lines and trains to Bergen. The only connection was the Oslo Port Line that went partially through some of the most trafficked streets in Oslo. The station building was designed by architect Georg Andreas Bull in the then-fashionable Italiante style and built of plastered brickwork. The facade against City Hall Square is flanked by two low towers. Windows and doors are arched. After the station closed, the building was used by, among others, the Nobel Peace Center. On 13 April 1921, the restaurant was taken over by Norsk Spisevognselskap, after it had received a renovation, which was completed on 1 May. In 1922, the company and Narvesen opened two kiosks at the station. After the station was partially destroyed on 2 February 1942, it remained closed until 1 June.

The Nobel Peace Center (Norwegian: Nobels Fredssenter) in Oslo, Norway is a showcase for the Nobel Peace Prize and the ideals it represents. The center is also an arena where culture and politics merge to promote involvement, debate and reflection around topics such as war, peace and conflict resolution. The center is located in Oslo, Norway at the City Hall Square (Rådhusplassen).