The Annex was a part of Otto Frank's office building that was secluded from the rest of the office space so, they were able to stay in hiding for approximately two years with only Mr. Frank's most trusted employees knowing of their existence in the Annex. The person who was the most trusted and who was the biggest help to the hiding and survival of the Franks, the Van Pels, and Mr. Dussel was Miep Gies. Mr. Kugler, Mr. Kleiman, and Bep Voskuijl were people who helped the Annex residents also. The part of the office they hid in was referred to as the Secret Annex by Anne because, no one except a certain few knew of it. The Secret Annex was concealed my a movable bookcase. The Annex had two floors and an attic. Anne spent most of her time writing in her room, or in the attic with Peter.