Let see out side of the round towers I see:
Sheet 1:
a bookshelf ,Elevator???, Pit, books dumped out on floor
Sheet 2 and 3:
Spiral staircases
Sheet 4:
A small hallway with runes on the floor (red or blue), Small magic circle (red or blue)
Sheet 5:
2 magic portals, 2 Wizards work table, a...