The Nave is the the first area of the dungeons surrounding the Inner Sanctum, the game's twenty-second area and the fourth Hub.
The Nave is the section of the castle reached upon escaping the Sewers by ladder. The ladder breaks and falls apart during the ascent, making it impossible to go back down. It is in this area Daniel first encounters Agrippa, and learns what has to be done to gain entry to the Inner Sanctum.
Several other areas can be accessed from the Nave:
There is also a passageway leading to the Cells but Daniel cannot access it just yet. He will be locked up in this area later on after being ambushed by the Gatherers. When the Shadow chases him back to the Nave, the door will not budge thereafter.
The Nave itself has many rooms and items, and is by far the largest Hub. Some items only appear after Daniel has made progress in the other areas of the castle. The upper levels of the Nave feature a small laboratory and house the machinery that operates the large doors to the Transept and Choir in the lower areas. To reach the chamber where Agrippa is Daniel must descend a long, dark, winding spiral stairway. There are also many spiders to be found here when Daniel is low on sanity. It is inadvisable to light all the torches here even though Daniel has to venture back to open the doors, for it is a large area that would waste many tinderboxes, and the torches get completely destroyed by the Shadow later. Between Agrippa's chamber and the Chancel are a number of cells, presumably for holding prisoners before they were tortured in the other rooms.
Towards the end of the game, the Shadow overwhelms the Nave and causes many areas to collapse, however it also opens up a hidden area where a bone saw can be found to saw off Agrippa's head.
- After the Shadow nearly takes over the Nave, the screen will slowly tilt left and right, as in the Rainy Halls.
- There are two maps representing this area in total; The first you encounter is the map after the Sewers which shows the Nave in a particularly good condition, and the second map is the one you encounter after getting back from the Cells, the second map shows the Nave mostly ruined by the Shadow.
- Investigating every prison cell in the Nave and leaving the doors open causes them to all suddenly close shut upon looking at the final room. The doors will then rupture as though being banged on while you hear people screaming.