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 County
Stockholm County () is a county or "län" (in Swedish) on the Baltic Sea coast of Sweden. It borders Uppsala County and Södermanland County. It also borders Mälaren and the Baltic Sea. The city of Stockholm is the capital of Sweden. Stockholm County is divided by the historic provinces of Uppland (Roslagen) and Södermanland (Södertörn). More than one fifth of the Swedish population lives in the county. Stockholm County is also one of the statistical "riksområden" (national areas) according to , Nomenclature of Territorial Units for Statistics within the EU. With more than two million inhabitants, Stockholm is the most densely populated county of Sweden.