Slussenområdet - Wikipedia
Émile Foucher

Slussenområdet ( Swedish: [ˈslɵsːɛnˌɔmroːdɛt], the Sluice area) is an area of central Stockholm, on the Söderström river connecting Södermalm and Gamla stan. The area is named after the locks between Lake Mälaren and the Baltic Sea. Called Karl Johanslussen, the locks themselves allow passage between these two bodies of water (of different levels).