Bråborg was a former Royal castle at Bråviken. The house was built by Queen Dowager Gunilla Bielke in 1588-1590 and she lived there after her husband, King John III of Sweden, died in 1592. Gunilla Bielke herself died at Bråborg in 1597. Bråborg was later owned by her son, duke John of Östergötland. In 1612 he married his cousin, princess Maria Elisabeth of Sweden. They both died at Bråborg in 1618.
The building was partly destroyed in a fire in 1669, and in 1719 it was burnt down by a Russian army. The army also attacked the nearby town of Norrköping. The inhabitants needed stone to rebuild their town and used building material from the ruins of Bråborg. The new manor house at Bråborg was built about 1,000 metres from the burnt down house.
Today, a ruin is all that remains of the estate. The foundations and cellars are still visible today, together with the moats and parts of the gardens.
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.