With a ridge height of 7.45 meters, the Oland Lighthouse is Germany's smallest operating lighthouse. It was built in 1929 on a rocky base made of natural stone resting on a reinforced concrete ceiling structure. The rectangular brickwork is 23 centimeters thick and supports a hipped roof covered with thatch. Wooden beams covered with planks were installed as intermediate ceilings. The lighthouse was operated by a twilight switch and an astronomical clock. The lighthouse was put into operation in the same year it was built. At a height of seven meters above mean high tide, the tower houses a beacon with a belt lens, which serves as a cross-marker light for the Föhrer Ley and the Dagebüll fairway. Originally, a marine lantern with a liquid gas burner was used; since the Hallig was connected to the electricity grid in 1954, the lighthouse has been electrically operated.[3][4] Jürgen Nommensen, a native of Oland, succeeded his father and grandfather as the lighthouse keeper, and the fault reporting system is located in his house, both then and now.[5]
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