This space is located near the cistern and dates from the same period. During the Spanish Civil War, it was used as an air-raid shelter for the Secondary School pupils and staff, as well as people from the local neighborhood. Its peculiar features (partially carved out of the rock, with thick walls and a barrel vault) and location, with a street entrance as well as inside stairs leading up to the cistern, made it ideal for this purpose. In the late 1960s, a coal shop was opened here, which was popularly known as the “coal cellar”. It is now a space for temporary exhibitions and other activities.