How much historical value?
Dungeons shouldn’t have trade portals. That’s not torture! Even if you give prisoners no money, they could while away the years doing TP jobs. I think you should devise some torture devices. Like give them a handcar but only 3 blocks of track. Give them a jetpack with no fuel, and a refinery with no power! mwaahahahahahahah, (cough, sputter, gasp) hahahahaha
I added more to my dungeon build. I plan to add more in the future
original: The dungeon
Instead of calling it a dungeon, why not a Cellar?