Gustav Adolfs torg

This guide to Gustav Adolfs torg in Stockholm traces how centuries of stone quarrying and river current flattened a gravel ridge into the square you're standing on. You'll hear about the spring flood of 1780 that tore out the wooden bridge once linking this square to the palace, and the ten-year project city architect Erik Palmstedt and master builder Jonas Lidstromer undertook to replace it. It follows how Lidstromer solved the problem of laying stone piers in moving water using a sunken, stripped-down barge.