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.
Geography of Stockholm
In an urban code dated 1350, King Magnus IV (1316-1377) prescribed the bridges leading over Norrström and Söderström to be built and maintained by the city of Stockholm together with six other cities surrounding Lake Mälaren, as they were the only land passage between the provinces Uppland and Södermanland, north and south of the city respectively. Apparently, in the view of the king, the city, a hundred years after its foundation, still couldn't afford to maintain its own bridges.