King Gustavus Adolphus of Sweden was building an empire around the Baltic and wanted a flagship to match. The Vasa, laid down in 1626 under Dutch master shipwright Henrik Hybertsson, was to carry an unprecedented 64 bronze guns on two full gundecks, her sterncastle rising in tiers of painted and gilded carvings — lions, Roman emperors, Greek gods — a floating statement of dynastic power.

The king pressed constantly for speed and armament. Hybertsson died mid-construction; specifications shifted; the hull came out tall, narrow, and, above the waterline, enormously heavy. The ballast space at the bottom could not hold enough stone to balance her.

Everyone in a position to know, knew. In the summer of 1628 Admiral Klas Fleming supervised a standard stability test: thirty men ran back and forth across the deck. The ship heeled so alarmingly that Fleming stopped the test after three passes. The king, then in Prussia, was demanding the ship join the fleet without delay. No one told him. The Vasa sailed.

10 August 1628

On a Sunday afternoon before crowds of Stockholmers — and assembled foreign diplomats — the Vasa left her mooring below the palace, fired a salute, and set four sails. A light gust heeled her; she recovered. A second gust off the Södermalm cliffs pushed her over until water poured through the open lower gunports.

She sank in about 32 metres of water, roughly 1,300 metres into her maiden voyage, masts still standing above the surface. Of perhaps 150 aboard — crew plus family members invited for the harbour leg — around 30 drowned.

Nobody’s fault

The inquest convened the next day, with the shaken captain hauled straight from the water to interrogation. Every witness pointed elsewhere: the crew were sober, the guns properly lashed, the ship built to approved dimensions. The approved dimensions traced back through the dead Hybertsson towards the king himself. No one was punished.

The wreck lay in the cold, low-salinity Baltic — too brackish for the shipworm that devours wooden wrecks elsewhere — until amateur archaeologist Anders Franzén located her in 1956. On 24 April 1961, watched on live television, the Vasa broke the surface after 333 years, some 95 per cent original. Preserved with polyethylene glycol over decades, she now sits in Stockholm’s Vasa Museum, the world’s best-preserved seventeenth-century ship and Scandinavia’s most visited museum — a monument, her curators like to note, to the danger of telling a powerful man only what he wants to hear.