Ilha de Santana Lighthouse

Ilha de Santana Lighthouse () is an active lighthouse on the namesake island located at the east entrance of the Baía de São Marcos, Maranhão, Brazil
Description.
The first lighthouse was lit on June 1, 1831 though the construction has been authorized since June 1822. The masonry tower was built in three years, close to the beach in a place without stone; it was high and the lantern was equipped with a rotating catoptrics lens with a range of . Soon after the lighthouse was threatened by the sea erosion and the efforts made to save it were unsuccessfully.
It was decided to build a new lighthouse far away; it had a quadrangular shape and a height of . The original rotating system was transferred on the new lighthouse which was lit on January 26, 1961. Years later the sea erosion was damaging the second lighthouse, therefore a third lighthouse was built. It was built a cast iron pyramidal skeletal tower prefabricated in England by Armstrong, Mitchell and Company. The new white painted lighthouse was lit on December 2, 1883 and the lantern was equipped with a 2nd order of Fresnel lens, built by Chance Brothers, emitting a white and red light. With the passing of the years the cast iron tower underwent a progressive deteriorating, caused by the rust, and the construction of a new lighthouse was essential.
The current cylindrical tower was built in concrete, with balcony and lantern by side the former; it has a height of and was lit on July 1, 1964. The lantern and the optical device were moved from the old lighthouse to the new one. The cast iron tower was partially dismantled and few years ago was completely demolished. The lighthouse emits two long alternate white flashes and one red every 51 seconds visible up to for the white light and for that red. The lighthouse is managed by Brazilian Navy and is identified by the country code number BR-0804.
See also.
List of lighthouses in Brazil