Fredrikinkatu (Swedish: Fredriksgatan, in Helsinki slang Freda) is a street in Helsinki that starts from the intersection of Tarkk'ampujankatu, Pursimiehenkatu, Laivurinkatu and Laivurinrinne (known as Viiskulma in Finnish) in the district of Punavuori and continues north by the western side of Kamppi Center until it reaches Lutherinkatu and the Temppeliaukio Church in Etu-Töölö.
The majority of Fredrikinkatu is a one-way street going north, although Helsinki's tram lines (3B and 3T) on it run in both directions between the Viiskulma intersection and Bulevardi. Tram lines are also being laid along Fredrikinkatu between Urho Kekkosen katu and Arkadiankatu.
Fredrikinkatu 21, Ratakatu 12: the headquarters of Suojelupoliisi, designed by E. Sihvola in 1888.
Fredrikinkatu 44: Sähkötalo, designed by Alvar Aalto. Sähkötalo is located across Fredrikinkatu from Kamppi Center.
Fredrikinkatu 65: Tennispalatsi.
The majority of the buildings along Fredrikinkatu are full of small shops and boutiques, especially in the area between Iso-Roobertinkatu and Eerikinkatu.Merimiehenkatu
Punavuorenkatu (to the left) / Ratakatu (to the right), a small square called Fredrikintori, is in the intersection
Iso-Roobertinkatu, which became a promenade east of Fredrikinkatu
Malminkatu (to the left) / Kansakoulukatu (to the right)
Malminrinne (to the left) / Urho Kekkosen katu (to the right), open only to public transportation
The triangular-shaped area between Fredrikinkatu, Malminkatu and Malminrinne is a square called Kampintori
Kampinkuja (to the left), a small promenade
Salomonkatu, which became a promenade east of Fredrikinkatu
The train line leading to Länsisatama runs in a gap between Eteläinen Rautatienkatu and Pohjoinen Rautatienkatu
Dagmarinkatu (to the right)