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.
Sweden's national bard, Carl Michael Bellman, was born in the Södermalm district of Stockholm, near the Riddarfjärden. Several of his Fredman's Epistles are set on Lake Mälaren, such as No. 48, the pastoral Solen glimmar blank och trind (The sun gleams smooth and round).
<gallery mode="packed" caption="Riddarfjärden throughout the year">
Riddarfjärden vinter 2012.jpg|Riddarfjärden in winter at Norr Mälarstrand
Långholmen 2009a.jpg|In the spring looking towards Långholmen
Riddarfjärden juli 2012.jpg|Early summer morning looking towards Södermalm
Riddarfjärden från Långholmen 2012.jpg|In the autumn, seen from Långholmen.
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See also
- Geography of Stockholm