The Castle The Castle is the former headquarters of the Minutemen in the Commonwealth in 2287 . It is a possible settlement and can be reclaimed during the Taking Independence quest . It is built into and is located to the east of the Gwinnett restaurant and brewery . Background . Before the Great War , it was known as Fort Independence . The Minutemen repurposed it as their headquarters in the Commonwealth until a colony of mirelurks forced them out in 2240 and took it as their nest . Preston Garvey asks the Sole Survivor to reclaim the Castle for a new generation of the Minutemen . Layout . Fort Independence is a star fort , consisting of five triangular bastions connected by walls . The walls are hollow and contain most of the fort ' s infrastructure , with only the workshop and the Radio Freedom transmitter out in the courtyard and two ruined gun positions on the top of the wall . The northwest and southwest walls have been all but demolished , and a sizable hole punched in the south wall as well , cutting off the west bastion — which contains the Castle armory — from access excepting through the Castle tunnels . The north bastion contains the Castle kitchen ; the east , the general ' s quarters and access to the Castle Tunnels ; the southeast , the barracks . The southwest bastion is completely inaccessible . The Castle is initially occupied by a large group of mirelurks , and piles of mud studded with mirelurk egg clutches can be found all over the courtyard and all interior areas save the armory . Once the quest Taking Independence is completed , these will be cleared away and the fort made available for settlement . Inside the fort is a missile launcher and flamer , as well as a small amount of ammunition for each . Once settled , it comes with five free beds , a medic stand , chemistry workbench , starter lighting and electrical cable system , and an industrial water purifier good for 40 units of water should the player reintroduce power into the system . Inside the Armory is a cache of heavy weapons , a weapon and armor workbench , and three free laser turrets that can be stored or redeployed elsewhere using the workshop menu . Also present are the schematics for building the special artillery units . However , access to the Armory is impossible until the quest Old Guns is completed . Access to the Castle settlement is done from the south via the main gate , and enemies will attack from this direction ; behind the gate is a small and highly defensible room , which combined with the Castle ' s high and easily repaired walls makes it one of the safest settlements in the Commonwealth . Appearances . The Castle appears only in " Fallout 4 " . Behind the scenes . Toward the end of the Castle tunnels , near General McGann ' s body , is a crate of Amontillado wine . Opposite the wine is a skeleton seemingly entombed in a wall . This is a reference to ' s story " " , where the protagonist ' s enemy is lured into an underground vault , chained and then encased by a wall . The label of the Amontillado Bottle reads " Montressor , Amontillado , Bottled by : P . Edgar " is again a direct reference to the work of Poe and the protagonist , Montresor .