Helgeandsholmen (Swedish: [ˈhêːlɡɛandsˌhɔlːmɛn]) is a small island in central Stockholm, Sweden. It is located north of Stadsholmen, and east of Strömsborg, with which, together with Riddarholmen, it forms Gamla stan, the old town of Stockholm. Helgeandsholmen contains the Riksdag Building and the Museum of Medieval Stockholm, and is connected to neighbouring islands through three bridges: Riksbron, Stallbron, and Norrbro. Despite the small size, it's very important as it contains the parliament building, where the Prime Minister is.
https://en.wikipedia.org/wiki/Helgeandsholmen