Str�msborg is a small islet in central Stockholm, Sweden, located north of Stadsholmen, and west of Helgeandsholmen, between the bridges Centralbron, a motorway passing through central Stockholm, and Vasabron. Str�msborg is part of Gamla stan, the old town of Stockholm and is connected to the rest of the world by the bridge Str�msborgsbron leading over to Vasabron