In 1847, on the initiative of the merchants of Vigo linked to the expanding maritime lines of steam and the presence of the Lazareto of the San Simón Island, the demand for the installation of a lighthouse inside the Vigo estuary begins.
This first Galician lighthouse built in the 19th century was lit in April 1844 with a fourth order catadioptric apparatus and a range of 7 miles for fixed light and 12 for flashes.
Its lighting system was modified several times by the needs of the growing maritime traffic.
Its electrification varied the range to 20 miles, which is the one that conserves at the moment.
Curiosities, myths and legends
A Guide along with O Castro, A Madroa, O Alba, O Cepudo, O Galiñeiro, Fragoselo (Coruxo) are the seven mountains that surround the city of Vigo.
The name of A Guide is a paronymy of the name given to the mountain, Monte del Águila.
In the past, a tunnel had been created, intended to cross the mountain to allow war material and supplies to circulate, when it was no longer needed as a military warehouse.
