Stockholm's narrowest street (Mårten Trotzigs gränd)

This guide to Marten Trotzigs grand, Stockholm's narrowest street, follows the ironmonger it's named for: a German merchant who arrived from Wittenberg in 1581 with nothing and cornered the city's iron and copper trade within a few years. You'll hear about the century the passage spent boarded shut, the failed attempt to rename it something grander, and the ordinary trip Trotzig took to a mining town in 1617. It ends with his own descendants returning centuries later to bolt a small plaque to the wall.