Riddarfjärden
Riddarfjärden (, "The Knight Firth") is the easternmost bay of Lake Mälaren in central Stockholm. Stockholm was founded in 1252 on an island in the stream where Lake Mälaren (from the west) drains into the Baltic Sea (to the east); today the island is called Stadsholmen and constitutes Stockholm's Old Town.
Stockholm Municipality
Geographically, Stockholm Municipality comprises the central part of the capital (Innerstaden or "Stockholm City Centre") as well as the southern and western suburban parts (Söderort or "South Stockholm" and Västerort or "West Stockholm" respectively). Of the municipal population, all but 200 people are considered living in the Stockholm urban area, a "tätort" further extending into ten other municipalities.