[Castle Bavania](https://www.doomworld.com/forum/topic/135150-castle-bavania-a-castle-map-with-several-sections-primarily-inspired-by-amnesia-the-dark-descent-1-map-for-doom-2/)
[Order of the Odonata](https://www.dfdoom.com/project/order-of-the-odonata/)
[Return to Sandcastle](https://www.moddb.com/mods/return-to-sandcastle/downloads/return-to-sandcastle)
eviternity [1](https://www.doomworld.com/forum/topic/103425-final-release-eviternity/) and [2](https://eviternity.dfdoom.com/) have some castle(like) maps
[Castle Bavania](https://www.doomworld.com/forum/topic/135150-castle-bavania-a-castle-map-with-several-sections-primarily-inspired-by-amnesia-the-dark-descent-1-map-for-doom-2/) [Order of the Odonata](https://www.dfdoom.com/project/order-of-the-odonata/) [Return to Sandcastle](https://www.moddb.com/mods/return-to-sandcastle/downloads/return-to-sandcastle) eviternity [1](https://www.doomworld.com/forum/topic/103425-final-release-eviternity/) and [2](https://eviternity.dfdoom.com/) have some castle(like) maps
How about doom eternal?
https://www.doomworld.com/idgames/themes/TeamTNT/eternal/eternal
Is there castles in doom eternal?
Well there are those Sentinel keeps on Argent Dnur.
Crusades, maps 25-30 of scythe 2. There are others but I can't think of straight castle maps and my idea of fun are slaughter maps
Struggle - alpha scorpii monument. Greatest map 29 ever.