Smeaton's Tower Smeaton's Tower Smeaton's Tower is a memorial to celebrated civil engineer John Smeaton, designer of the third and most notable Eddystone Lighthouse. A major step forward in lighthouse design, Smeaton's structure was in use from 1759 to 1877, until erosion of the ledge it was built upon forced new construction. The tower was largely dismantled and rebuilt on Plymouth Hoe in Plymouth, Devon, where it stands today. The Royal Society recommended Smeaton for the task, and he modelled the lighthouse on an oak tree. He rediscovered the use of hydraulic lime, a form of concrete used in Roman times. The
Heligoland lighthouse Heligoland lighthouse Heligoland lighthouse () is located on Germany's only offshore island, Heligoland. Constructed during World War II as an anti-aircraft tower, it was turned into a lighthouse in 1952. It features the strongest light on the German North Sea coast with a range of so that it can be seen as far as on the East Frisian or the North Frisian islands and Halligen. The lighthouse is operated by the Tönning water and shipping authority. The first lighthouse on Heligoland was built by Trinity House in 1811, when Heligoland was under British rule. The so-called "English lighthouse" ("englischer Leuchtturm")