The Fraeylemaborg was one of the most important borg in the province of Groningen. These strong houses or keeps were built in the Middle Ages to store harvests and to protect their produce from robbers. Besides churches, these structures were the only buildings that used durable stone and masonry. In due time they grew to become centres of power and wealth. The Fraeylemaborg is located in the middle of the town of Slochteren which upon its discovery in 1959 gave its name to the largest gasfield in the world.
In 1475 there was already a farm with the name Frealemaheerd. The building originates from the 16th century. The left wing was built in the 17th century. In 1680 the borg was sold by Evert Rengers, son of the former lord of the manor, because of his family debts. It was bought by Henric Piccardt (married to Anna Elizabeth Rengers, Evert's sister), who borrowed the necessary funds from Stadtholder William III. Piccardt extensively rebuilt the borg and he also landscaped a huge formal garden in the style of Louis XIV's France. After Piccardt's death the borg fell into disrepair. In 1781 the Fraeylemaborg was sold to Hendrik de Sandra Veldman. He rebuilt it into the shape it has today. Among his innovations was the removal of two towers which had graced the front square.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.