Belfast (meaning: "mouth of the sandbanks") is the capital and largest city of Northern Ireland, the second-largest city in Ireland after Dublin, and is situated around the River Lagan, which runs through the city. It is a port city known as the birthplace of the RMS Titanic, and for its political murals, documenting the ‘Troubles’ of the 20th century. Today, Belfast remains a centre for industry, as well as the arts, higher education, business, and law, and is the economic engine of Northern Ireland. The city suffered greatly during the period of conflict called "the Troubles", but latterly has undergone a sustained period of calm, free from the intense political violence of former years, and substantial economic and commercial growth. Additionally, Belfast city centre has undergone considerable expansion and regeneration in recent years, notably around Victoria Square.

Oslo is a county and municipality, as well as the capital and largest city in Norway. Oslo was established as a municipality on 1 January 1838. Founded around 1048 by King Harald III "Hardraade" of Norway, the city was largely destroyed by fire in 1624. The Danish–Norwegian king Christian IV moved the city, rebuilding it closer to Akershus fortress, as Christiania (briefly also spelt Kristiania). In 1925, the city reclaimed its original Norwegian name, Oslo. The diocese of Oslo is one of the five original dioceses in Norway, which originated around the year 1070.

Russia, also officially known as the Russian Federation - the world’s largest nation, borders European and Asian countries as well as the Pacific and Arctic oceans. The name Russia is derived from Rus, a medieval state populated mostly by the East Slavs. However, this proper name became more prominent in the later history, and the country typically was called by its inhabitants "Русская Земля" (russkaja zemlja), which can be translated as "Russian Land" or "Land of Rus''.  Its landscape ranges from tundra and forests to subtropical beaches. It’s famous for novelists Tolstoy and Dostoevsky, plus the Bolshoi and Mariinsky ballet companies.

Dublin is the largest and capital city of Ireland. The English name is derived from the Irish name Dubh Linn, meaning "black pool". It is a primate city with an urban population of over 1 million, containing almost 25% of the country's population. Dublin is situated near the midpoint of Ireland's east coast, at the mouth of the River Liffey, and at the centre of the Dublin Region. The city is listed by the Globalization and World Cities Research Network (GaWC) as a global city, with a ranking of "Alpha-", placing it among the top thirty cities in the world. It is a historical and contemporary centre for education, the arts, administration, economy and industry.

Bergen is the second largest city in Norway with a population of 261,600 as of April 31, 2011. Bergen is the administrative centre of Hordaland county. Greater Bergen or Bergen Metropolitan Area as defined by Statistics Norway, has a population of 386,900 as of April 31, 2011. Bergen is located in the county of Hordaland on the south-western coast of Norway. It is an important cultural hub in its region, recognized as the unofficial capital of Western Norway and sometimes also referred to as the Atlantic coast capital of Norway. The city was one of nine European cities honoured with the title of European Capital of Culture in the Millennium year.

Kristiansand, historically Christiansand, is a city and municipality in Norway. It is the fifth largest city in Norway and the municipality is the sixth largest in Norway. Tourism is important in Kristiansand, and the summer season is the most popular for tourists. Kristiansand Zoo and Amusement park is the largest zoo in Norway. It receives over 900,000 visitors every year. Markens Street is the main pedestrian street in downtown Kristiansand. Bystranda is a city beach located in Kvadraturen; in addition, Hamresanden beach is the longest beach in Kristiansand. Hamresanden Camping is a popular family camp during the summer season. The city hosts a free concert in downtown Kristiansand once every week in the summer. Outside the city is the industry park Sørlandsparken, which has Sørlandssenteret, the largest mall in Norway.