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 during the Swedish Empire
Finally, the island Kungsholmen east of present-day St Eriksgatan was also incorporated into the city by a donation in 1644 stipulating that streets and buildings on the island should follow the existent plan for the district. Like on Södermalm, the varied terrain on Kungsholmen made the task of implementing a city plan featuring straight streets impossible, but several of the still existent artery streets date back to this time, including Fleminggatan, Kungsholmsgatan, and Hantverkargatan.