Str�ngn�s is a locality and the seat of Str�ngn�s Municipality, S�dermanland County, Sweden with 12,856 inhabitants in 2010.It is located by Lake M�laren and is the episcopal see of the Diocese of Str�ngn�s, a former Roman Catholic and present Lutheran Diocese, with the Str�ngn�s Cathedral, built 1291 as an important landmark
