Roter Sand Lighthouse
| Location | Offshore, mouth of the Weser River German Bight |
|---|---|
| Coordinates | 53°51′18″N 8°04′45″E / 53.855°N 8.079167°E |
| Tower | |
| Constructed | 1885 |
| Foundation | steel caisson basement |
| Construction | cast iron |
| Height | 28 metres (92 ft) |
| Shape | tapered cylindrical tower with balcony and lantern |
| Markings | tower with horizontal white and red bands, black basement, lantern and roof |
| Operator | Förderverein Leuchtturm Roter Sand |
| Heritage | kulturdenkmal |
| Light | |
| Deactivated | 1986 |
| Focal height | 24 metres (79 ft) |
Roter Sand is a lighthouse in the North Sea, in the Weser estuary. It entered service in 1885. The light was deactivated in 1986 but the tower still serves as a day beacon. Roter Sand Lighthouse was the first building ever to be erected directly on the sea floor.
It became a symbol of technical progress in the German Empire and is still one of the most famous lighthouses in Germany. On 31 October 2010, it was awarded the title of Historical Landmark of Civil Engineering in Germany.