In the nineteenth century the need to install a light to help the entry of ships in the bay of Corunna signaling the very island where the Castle of San Antón is set and especially the dangerous rocks of the Souls and the known basses of the Pedrido, Zone of obligatory step to verify the last change of course before entering port.
A lighthouse was not planned properly but a lantern or port light, but according to the norms it should be rotating and of color not to confuse it with the ones of earth. This lantern must have been lit in the year 1846 and was less than the lights of the fourth order.
The constant growth of maritime traffic in the port of Corunna led to the construction of a small order lighthouse, commissioned by the engineer José María Bellón. It was located on the eastern platform of the castle. It was ordered that the material to be used was the iron making it the first lighthouse made in this material in Spain. Subsequently it was demolished and built in stone.
Today the stone turret keeps the original lantern with the characteristic metallic capulin painted green with a range of 6 nautical miles.
Curiosities, myths and legends
At the entrance of the estuary of A Coruña on a small island is built the Castle of San Antón. It is not a castle to use because it has no moat or drawbridge or tribute tower but if a cistern where rainwater is stored outside to supply water to the garrison in case of siege.
We find on the cover of the fortress the coat of arms of the Marquis de Cerralbo, governor and builder of the fortress, was captain general of Galicia between 1587 and 1594. He was nicknamed "the tireless."
