Karl Johanslussen is a lock and a sluice, along the Söderström river connecting and controlling the flood discharge between Riddarfjärden, the easternmost part of Lake Mälaren, and Saltsjön, the section of the Baltic Sea reaching into central Stockholm, Sweden. The lock is 75 metres long, 10 metres wide and 3.90 metres deep. The maximum height is 3.8 metres. The lock is closed from 2016 to 2021 due to large reconstruction works in the area.
Sightseeing boat in the lock.
Detail from Vädersolstavlan showing the area in 1535 viewed from south-west.
Detail from a copperplate by Frantz Hogenberg in the 1560s showing the area viewed from south-east.
Polhems Sluss (built 1747–1755), Painting by Anders Holm (1780)
Södermalm, often shortened to just Söder, is the southern district of Stockholm City Centre.
18th century housing facing Riddarfjärden
Brännkyrkagatan on Södermalm.
Ryssgården square at the Slussen area, Södermalm.
Wooden house at Åsögatan 213, built 1730.