Liinmaa Castle ("Vreghdenborch") was a medieval castle in Eura. In 1367 Albrecht von Mecklenburg, the king of Sweden, ordered to demolish a castle in Kokemäki. It was replaced by two new castles, one in Liinmaa and another in Linnaluoto (Aborch). Liinmaa castle contained two inner ground walls, wooden structures and a moat. The story of Liinmaa castle was very short: it was abandoded in the beginning of the 15th century when administration was moved to Kastelholm and Turku Castles.
By the legend Liinmaa was also a camp of pirates. This may refer to Victual Brothers, a brotherhood hired in 1392 by the Albrecht von Mecklenburg to fight against Denmark.
Nowadays only some earth walls remains the history of Liinmaa castle.
The Erfurt Synagogue was built c. 1094. It is thought to be the oldest synagogue building still standing in Europe. Thanks to the extensive preservation of the original structure, it has a special place in the history of art and architecture and is among the most impressive and highly rated architectural monuments in Erfurt and Thuringia. The synagogue was constructed during the Middle Ages on the via regia, one of the major European trade routes, at the heart of the historical old quarter very close to the Merchants Bridge and the town hall. Many parts of the structure still remain today, including all four thick outer walls, the Romanesque gemel window, the Gothic rose window and the entrance to the synagogue room.
After extensive restoration, the building was reopened in 2009. On display in the exhibition rooms is an collection of medieval treasures discovered during archaeological excavations. This includes 3,140 silver coins, 14 silver ingots, approx. 6,000 works of goldsmithery from the 13th and 14th centuries and an intricately worked wedding ring of the period, of which only two others are known to exist anywhere in the world. A mikveh (Jewish bath) has been excavated close by (13th/14th century). The Old Synagogue, the Small Synagogue and two Jewish cemeteries together form a network of historical buildings and sites which vividly portray the role of Jewish life in the history of Erfurt.