This shelter, made up of several sections, was built in 1938, during the Civil War (1936-1939), as a response to the air raids which, for the first timen in the history, were being carried out systematically against the civilian population un non-combat zones. Built with reinforced concrete and originally covered with a mound of earth over two meters high, the shelter was made to withstand the direct impact of a bomb weighing up to one hundred kilograms. It has two entrances, connected by a corridor, and a surface area of 548.67 m², of which 357.86 m² were used to give protection to up to seven hundred people. This was the only bomb shelter in the city that had electricity.