During the Middle Ages, an Old Prussian fort called Malcekuke was located near the current site of Pieniężno. The Teutonic Knights built an Ordensburg castle near Malcekuke in 1302. Both the castle and the town which developed nearby were destroyed during the war between the Teutonic Order and the Kingdom of Poland in 1414. During the Thirteen Years' War, Mehlsack surrendered to the Order, and the castle burned down during Poland's recapture of the town. From 1589-1599, Prince Andrew Cardinal Báthory of Transylvania, cousin of Sigismund Báthory, was the administrator for the castle. In 1550, the Prussian army laid siege to the city and partially burned it down.
The town was captured by Swedish troops in 1626 during the Polish-Swedish War of 1625-29, recovered by Hetman Stanisław Rewera Potocki, and then had its castle partially destroyed by Swedish troops in 1627. The castle was restored in 1640 with Baroque gables, and its function changed from being a fortress to being a château.
During the 19th and 20th centuries the castle lost some of its Gothic and Baroque features, and in 1870 its eastern and southern wings were demolished after extensive deterioration. The remainder of the castle was used as administrative offices for Prussianofficials. From 1920-31 the western wing was renovated so the castle could be used as a school and museum. In 1945, Mehlsack, including its castle, was 90% destroyed by fighting during World War II and was conquered by the Soviet Red Army from Nazi Germany.References:
Situated in the basement of Metropol Parasol, Antiquarium is a modern, well-presented archaeological museum with sections of ruins visible through glass partitions, and underfoot along walkways.
These Roman and Moorish remains, dating from the first century BC to the 12th century AD, were discovered when the area was being excavated to build a car park in 2003. It was decided to incorporate them into the new Metropol Parasol development, with huge mushroom-shaped shades covering a market, restaurants and concert space.
There are 11 areas of remains: seven houses with mosaic floors, columns and wells; fish salting vats; and various streets. The best is Casa de la Columna (5th century AD), a large house with pillared patio featuring marble pedestals, surrounded by a wonderful mosaic floor – look out for the laurel wreath (used by emperors to symbolise military victory and glory) and diadem (similar meaning, used by athletes), both popular designs in the latter part of the Roman Empire. You can make out where the triclinium (dining room) was, and its smaller, second patio, the Patio de Oceano.
The symbol of the Antiquarium, the kissing birds, can be seen at the centre of a large mosaic which has been reconstructed on the wall of the museum. The other major mosaic is of Medusa, the god with hair of snakes, laid out on the floor. Look out for the elaborate drinking vessel at the corners of the mosaic floor of Casa de Baco (Bacchus’ house, god of wine).