Stockholm's narrowest street - Mårten Trotzigs gränd

Mårten Trotzigs gränd (Swedish: "Alley of Mårten Trotzig") is an alley in Gamla stan, the old town of Stockholm, Sweden. Leading from Västerlånggatan and Järntorget up to Prästgatan and Tyska Stallplan, the width of its 37 steps tapers down to a mere 90 centimetres (35 in), making the alley the narrowest street in Stockholm.