Fortress-Monastery

A fortress-monastery is the central base of a Space Marine Chapter. As Space Marines are viewed as warrior monks, a fortress-monastery holds elements of both a military base and a monastic chapel. Exactly what constitutes a fortress-monastery will vary depending on the Chapter in questions. Most Chapters will have their fortress-monastery based on their homeworld, usually isolated from the rest of the planet's population. In Fleet-based Chapters, the fortress-monastery may either be a star fort or space station (such as the Imperial Fists Phalanx) or battle-barge which serves as the Chapter's flagship (such as the Black Templars' Eternal Crusader).

Taking no chances with regards to defense, a fortress-monastery will be the most well defended bastion of Imperial strength on the planet (the fact that most Space Marine Chapters live on Feral and Death Worlds whose inhabitants are usually unaware of the greater galaxy is not an issue). Indeed, the only way that a fortress-monastery is not the most defended base in the entire sector is in the off chance that another Space Marine fortress-monastery is located in the same sector.

Each chapter will have different buildings and substructures as per tradition or need, but the following locations are always found in fortress-monasteries:

• Apothecarion: The fortress-monastery's medical center, where surgical suits for transforming Neophytes into full Astartes is done. It is also the place where gene-seed is housed, and possesses facilities to assist Apothecaries in gathering genetic data from progenoids and cultivate them into gene-seed organs.
• Armoury: The abode of the Techmarines, which serves as the Chapter's motor pool, repair shops, and chapel to the Omnissiah all in one. Several Chapters with unique equipment, such as the Blood Angels and the Dark Angels, have special Standard Template Constructors which fashion unique vehicles and weapons. The Chapter's Dreadnoughts will often be housed in a subsection of the Armoury.
• Chapter Master's quarters: The private throne room and personal cell of the Chapter Master. Frequently the Chapter Council, composed of the ten Brother-Captains and other senior officers, will meet in the Chapter Master's throne room.
• Communal dormitories: Housing for the Chapter Serfs, when they aren't attending to their duties.
• Company block: The housing for each Space Marine company. Each Astartes is given a single small room, called a cell, which houses a bunk and a place to store their Power Armour. Each squad has a personal arming chamber which stores their weapons, ammunition, and replacement parts for their Power Armour. The Brother-Captain will have a larger cell that serves as an office where he can work on the logistical matters of company leadership and a private arming chamber. Each Company block will also house a Company chapel, where the Chaplain will lead them in prayer.
• Librarium: The abode of the Librarians, where the Chapter's records are housed and where potential Librarians are tested. The Chapter's Astropaths will often work in here, as well.
• Reclusiam: The abode of the Chaplains, where rituals involving the whole Chapter, such as the coronation of a new Chapter Master or a funeral for an entire company, will be held. The Reclusiam also contains ancient Chapter relics, and is overseen by the Reclusiarch, a post sometimes held by the Master of Sanctity.

Notable fortress-monasteries

• Fortress of Hera: the fortress-monastery of the Ultramarines, located in the Mountains of Hera on Macragge. It was the site that Roboute Guilliman crashed landed thousands of years ago.
• Phalanx: The fortress-monastery of the Imperial Fists. A massive space-ship/station designed by Rogal Dorn while he was ruling Inwit before the Emperor rediscovered him.
• Mount Seraph: the fortress-monastery of the Blood Angels, built upon Mount Seraph, the largest mountain on Baal. Despite more than 25 years, four novels, and three and a half codices (they split Codex: Angels of Death with the Dark Angels in 2nd edition) the damn thing still hasn't been given an official name.
• The Fang: the fortress-monastery of the Space Wolves, and the tallest mountain on Fenris. Unsurprisingly, whoever did the Fenrisian to Imperial Gothic translation screwed up. The Wolves (who call themselves the Vlka Fenryka) refer to their fortress-monastery as the Aett, which in Imperial Gothic means "clan home" or "den".
• The Rock: the fortress-monastery of the Dark Angels. Originally known as the Tower of Angels, the served as the fortress-monastery of the Dark Angels on Caliban, and its impressive void shields allowed it to survive the planet's destruction. The Rock also serves as a miniature Gitmo for the Fallen Angels NOTHING MORE THAN A STANDARD FORTRESS-MONASTERY, BECAUSE THE DARK ANGELS HAVE NOTHING TO HIDE.
• Prometheus, the fortress-monastery of the Salamanders. Prometheus is the moon of Nocturne, but in reality the fortress-monastery is little more than a space port and barracks for the First Company, while the bulk of the Salamanders Chapter live in Chapter Bastions in Nocturne's Sanctuary Cities.
• Quan Zhou: the fortress-monastery of the White Scars, located on Chogoris. Originally the site of Jaghatai Khan's fortress in the Khum Kharta mountains, like the Blood Angels fortress-monastery, the White Scars fortress-monastery went years without an official name before finally getting one in 6th Edition.
• Ravenspire: fortress-monastery of the Raven Guard, located on Deliverance. Originally the guard tower for the Kiavharan enslavers, the Ravenspire was re-purposed as the stronghold of the Deliverance freedom fighters. Corvus Corax had a delicious sense of irony.
• Land-Behemoths: the fortress-monasteries of the Iron Hands. The planet Medusa, the Iron Hands homeworld, is so tectonically unstable that the Iron Hands cannot risk making a single structure to house their gene-seed, Armoury, and Chapter relics, so each clan-company uses an Ordinatus sized vehicle known as a Land-Behemoth to travel around in.