Built by the Teutonic Knights in 1350, the Great Mill with its rising tiled roof is the grandest civil construction in Gdańsk. Until 1356 when the Radunia Canal was built, the mill was powered by slaves turning 18 huge wheels. It was the largest industrial plant in Europe during the Middle Ages and functioned until the end of WWII. Unfortunately, this treasure has since been turned into a shopping centre. At least there's a small exhibition of old equipment from the mill. The surrounding grain and flour stores, dating to 1400, are home to a few small shops.
References:Trenčín Castle is relatively large renovated castle, towering on a steep limestone cliff directly above the city of Trenčín. It is a dominant feature not only of Trenčín, but also of the entire Považie region. The castle is a national monument.
History of the castle cliff dates back to the Roman Empire, what is proved by the inscription on the castle cliff proclaiming the victory of Roman legion against Germans in the year 179.
Today’s castle was probably built on the hill-fort. The first proven building on the hill was the Great Moravian rotunda from the 9th century and later there was a stone residential tower, which served to protect the Kingdom of Hungary and the western border. In the late 13th century the castle became a property of Palatine Matúš Csák, who became Mr. of Váh and Tatras.
Matúš Csák of Trenčín built a tower, still known as Matthew’s, which is a dominant determinant of the whole building.