John Smeaton He pioneered the use of 'hydraulic lime' (a form of mortar that will set under water) and developed a technique involving dovetailed blocks of granite in the building of the lighthouse. His lighthouse remained in use until 1877 when the rock underlying the structure's foundations had begun to erode; it was dismantled and partially rebuilt at Plymouth Hoe where it is known as Smeaton's Tower. Deciding that he wanted to focus on the lucrative field of civil engineering, he commenced an extensive series of commissions, including: Smeaton is considered to be the first expert witness to appear in an English
Sept-Îles lighthouse a French lighthouse. The archipelago of Sept-Îles has been a bird sanctuary since 1912. The Sept-Îles lighthouse was one of the last French lighthouses to be manned, and only became automated at the end of August 2007. Sept-Îles lighthouse The Sept-Îles lighthouse is an active lighthouse in Perros-Guirec, (Côtes-d'Armor) France, located on the "Île aux moines", an island of the Sept-Îles archipelago in the English Channel. The island is accessible but the lighthouse is closed to the public. The first lighthouse, a round tower, was illuminated in May 1835, and then replaced in 1854 by a square tower 16 ft