Radetzkybrücke, Protected heritage bridge in Vienna, Austria

The Radetzkybrücke is the last bridge over the Wien River before it reaches the Danube Canal, linking Uraniastraße in the Innere Stadt with Radetzkystraße in the Landstraße district. Its iron structure, built in 1899–1900 to designs by Josef Hackhofer and Friedrich Ohmann, has two arched girders carried on a single stone pier. Art Nouveau ornaments decorate the bridge, and its railings follow the pattern of Otto Wagner's Stadtbahn.

The current structure was erected in 1900 following designs by Josef Hackhofer and Friedrich Ohmann as part of the Wien River regulation project. The project represented part of the major urban reshaping of the river course at the beginning of the 20th century.

The bridge is named after Field Marshal Joseph Radetzky von Radetz, and the name has been in use since 1869. Its two stone lighthouses, added in 1907–1908, vanished in the war and were rebuilt in 1991 from old photographs; they now stand at the bridgeheads as a distinctive feature of the crossing.

The bridge can be crossed on foot or by bicycle and provides space for car traffic and trams. The crossing offers easy access between Uraniastraße in the Innere Stadt and Radetzkystraße in the Landstraße district.

The bridge features Art Nouveau decorations and railings designed by Otto Wagner that are typical of his urban railway projects. It is one of the final crossings before the Wien River meets the Danube Canal and displays Wagner's characteristic style in its fixtures.