The Bridge of Prado (Ponte do Prado) over the Cávado River was originally a Roman bridge. It was re-constructed during the 16th century when the original had been destroyed following flooding and consistent use. There are few vestiges of the Roman bridge.
The bridge's exit (to the north) fronts the Praça do Conselheiro Sousa Lima, a gardened area, the site of a 16th-century pillory marking Prado's historical importance as a municipality until the 19th century.
The flat-top shallow cantilever bridge consists of nine Roman arches that progressively increase in size the closer to the centre of the span, with the three largest arches slightly peaked. Eight triangular abutments protect the base of the bridge from debris, while polygonal structures downstream act as reinforcements.
References:The Royal Palace was built in the first half of the 19th century as the Norwegian residence of King Charles III, who also reigned as king of Sweden and otherwise resided there, and is the official residence of the present Norwegian monarch. The crown prince resides at Skaugum in Asker west of Oslo. The palace has 173 rooms.
Until the completion of the Royal Palace, Norwegian royalty resided in Paleet, the magnificent town house in Christiania that the wealthy merchant Bernt Anker bequeathed to the State in 1805 to be used as a royal residence. During the last years of the union with Denmark it was used by the viceroys of Norway, and in 1814 by the first king of independent Norway, Christian Frederick.