The first Spreuerbrücke bridge was constructed in the 13th century to connect the Mühlenplatz (Mill Place) on the right bank of the Reuss with the mills in the middle of the river. The extension of the bridge to the left bank was completed only in 1408. This was the only bridge in Lucerne where it was allowed to dump chaff and leaves into the river, as it was the bridge farthest downriver. The bridge was destroyed by a flood in 1566 and then rebuilt, together with a granary as the bridge head, called the Herrenkeller.
The pediments of the Spreuer Bridge contain paintings in the interior triangular frames, which is a feature unique to the wooden bridges of Lucerne. In the case of the Spreuer Bridge, the paintings form a Danse Macabre, known as Totentanz in German, which was created from 1616 to 1637 under the direction of painter Kaspar Meglinger. It is the largest known example of a Totentanz cycle. Of the 67 original paintings, 45 are still in existence. Most of the paintings contain the coat of arms of the donor in the lower left corner and to the right the coat of arms of the donor's wife. The black wooden frames bear explanations in verse and the names of the donors. The paintings also contain portraits of the donors and other exponents of Lucerne society. The painters of Lucerne knew the woodcuts by Hans Holbein the Younger but were more advanced in their painting technique. The images and texts of the Lucerne Danse Macabre are intended to highlight that there's no place in the city, in the country or at sea where death isn't present.
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.