The Great Mill was built by the Teutonic Knights in 1350 on the artificial island of Radunia. It was one of the largest medieval grain mills in Europe. In 1454, it was captured by the inhabitants of Gdańsk, belonging to the anti-Teutonic conspiracy, which initiated the uprising against the supremacy of the Teutonic Order. After the Thirteen Years War, which was victorious for Poland, king Kazimierz Jagiellończyk handed over the mill to the inhabitants of Gdańsk. Until 1939, it remained in use and produced up to 200 tons of flour per day. During the Second World War it was partially destroyed. In 2016, it was donated to the needs of the Amber Museum.
Gdańsk boasts the second medieval watermill, also located on the Radunia canal in the Old Town. It was built around 1400 and served mainly as a granary for products from the Great Mill situated on the opposite side.
The Great Mill is 26 meters high and 41 meters long, it has 18 bucket wheels with a diameter of 5 meters. These wheels were on the two lower floors, six of the upper floors were intended for a warehouse. In the annex to the east, you could bake bread, then sold, among others, on the Bread Bridge at the Old Town Hall. Around the Great Mill there were also many other buildings, such as stables, bread stalls and the mill manager’s house.
Webpage wikipedia.org, Wielki Młyn w Gdańsku.