The initials B.O.T.A. stand for Builders of the Adytum, which is a fraternal traditional association founded by Paul Foster Case, followed and extended by Ann Davies.
Builders of the Adytum offers graded lessons based on the mystical teachings and practices of the Holy Qabalah and the Sacred Tarot.
B.O.T.A. is an international, non-profit, teaching and training Order, whose headquarters have been in Los Angeles for the past 60 years.