There isn't a magic pack, the cauldron was from Sims2, someone had meshed it for Sims3 on modthesims.info
The stonework for the walls etc. were part of the game I think. The books, desks and other miscelleanous schoolstuff were from around the sims website I think. Banners and medieval stuff were downloaded from the sims official website (you get so many points to spend when you first buy the game). So no, no pack as such, you just have to look around and see if you can find things that you'll need or like :)