A little historyThe granite tower was built from 1826 to 1835, following the plans of physicist Augustin Fresnel, chief engineer and secretary of the Lighthouse Commission in Paris. A true genius of light polarization, in 1825 Fresnel unveiled his “Map of Lighthouses,” describing a system of 51 lighthouses and smaller port lights to be installed on the coasts of France. He then classified the lighthouses according to “orders”. The lighthouses of the first order are those that have the greatest range and are equipped with the largest lenses.
Designed by physicist and pioneer of light polarisation Augustin Fresnel, Grand Phare’s granite tower was built over 9 years from 1826 to 1835. As Chief Engineer and secretary to the Lighthouse Comission in Paris, Fresnel unveiled in 1825 what he called his “Map of Lighthouses”, a proposed map of 51 lighthouses and smaller harbour lights to be installed along France’s coasts. He then classified each light in a series of “Orders”, with “First Order” lighthouses being the most powerful and consequently, visible from the furthest distances.
Function: Large landfall light, i.e., navigational aid for approaching a coast
Location and coordinates: Bangor, Belle-Île-en-Mer, Morbihan, Brittany | 47°18′ 39″ N 3°13’37” W
Construction and commissioning: 1826 – 1833 | 1835
Number of steps: 247
Height, elevation and range: 52.25 meters from the base; 92 meters above highest seas; 27 miles (about 50 km)
Light pattern: 2 white flashes every 10 seconds (flash, 7s, flash, 3s)
Lantern Features: 1000 watt metal halide lamp and 650 watt halogen emergency light.