Ansem's study

Ansem's study was the private study of Ansem the Wise in Hollow Bastion. The room contained a throne and desk, containers filled with hearts, and books. As leader of Radiant Garden, he used it to store his research on the heart. There was a secret passage in the wall to Ansem's computer in the study. King Mickey and Ansem often talked in there. There was a portrait of Xehanort in the study, though it is unknown if Ansem or Xehanort put the picture up there.

In Kingdom Hearts II Ansem's study is used for the world Tron lives in. It shows the password which are the Princesses of Heart