The Great Tower Neuwerk is the most significant building of the Neuwerk island, belonging to Hamburg. This former beacon, watchtower and lighthouse is also the oldest building in Hamburg and oldest secular building on the German coast.
The construction was started in 1300. It was completed after ten years in 1310. The style matches the common norman tower type of the time. Contrary to some literature, the tower was built in this form from the beginning. The fire in the 1360s destroyed most of the wooden elements and it had to undergo major reconstruction.
The original roof was made of lead, and was replaced by copper in 1474. This was again replaced in 1558 by a tiled roof and by a new copper roof following that. The copper was then used for military purposes in 1916 reconstructed later.
The original purpose was to host troops to defend the ships entering and leaving the Elbe from sea and beach pirates. The tower was also refuge for the farmers on the island during storm surges and survivors of shipwrecks over the centuries.
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.