For my sanctuary I decided to go into the Nether (Minecraft Hell basically) as this is the are most similar to Darth Maul's home planet of Dathomir:
As seen in the video the ground floor has my attempt of double sided light sabers hung on the wall as well as a circle mat type area for what I am saying is where he trains using his saber. Upstairs I covered the walls in paintings with beds in the middle to give it as creepy of a look as possible. Downstairs is a viewing are of the hellish world he lives in. I used nether brick and obsidian for most of the house as they are two dark and evil looking blocks.
Here is the link to the video: https://youtu.be/HTGOGlsOA8U