They are located on the left side of the upper part of Pitz’e Serra Street, in the fields between Brotzu, Levi, and Giua schools and Lake Simbirizzi. Since the early 1940s, at least 1,500 permanent emplacements were built throughout the Island, which formed, together with military anti-aircraft and anti-ship batteries, the island’s defense during the conflict. Also called “casemates,” they were built of iron and concrete and camouflaged in the guise of hillocks, dwellings, country churches or nuraghi, such as Nuraghe Diana and Nuraghe Is Meris, adapted as machine gun or cannon emplacements. Simbirizzi’s are about a dozen and are in very good condition. They are scattered in groups except for the lone “Fake Church.” Recently, some have been cleaned up and made usable thanks to volunteers who have worked to restore decorum and memory to the fortified systems, historic reminders of a tragic and not-so-distant past.