BUILDERS OF THE ADYTUM (B.O.T.A. or BOTA) is a true Mystery School, an international, non-profit teaching and training Order, and an outer vehicle of the Inner Spiritual Hierarchy, sometimes called the Inner School, which guides the evolution of Man. Adytum is derived from an ancient Greek word designating the innermost part of the Temple, the Holy of Holies, that which is not made with hands. Its system is that of the Western, Qabalistic-Hermetic tradition, and its teachings have been handed down from Adepts to Initiates since very ancient times.

The founder of BOTA, Dr. Paul Foster Case, was such an Adept. As a recognized world authority on the Tarot and Qabalah, he was given the task by the Inner School of reinterpreting the Ageless Wisdom into modern idiom.