This is The Evil Wizard's treasure room. Actually, most of this stuff was inherited from his father. The zombie and skeletons attack if anyone other than The Evil Wizard, the Evil Wizard's sister or Brutus enter.
If any of the items here are taken, eventually word will get back to the father's adventuring band. The adventuring band will come looking for the stuff back. If the daughter was killed or in anyway harmed, the adventuring party will hunt the party down and kill them.