"The Magickal Title of this card is The Lord of the Hosts of the Mighty. The path of the Tower is the first reciprocal path encountered by the initiate aspiring upwards on the Tree. It equilibriates between Hod (intellect) and Netzach (emotions), thus it straddles all three Pillars on the Tree. It is "The Victory over Splendor. Venus acting through Mars upon Mercury. Avenging force." This is one of the most difficult paths to undertake on the Tree, because it involves sudden and complete destruction of old "realities." To one undertaking this path, it can be quite an ordeal. Yet the total destruction of the Tower is followed by a rebuilding and restructuring which reveals a portion of the Higher Self and balances the dualities inherent in all humans the conflict between mind (Hod) and emotions (Netzach). The balancing of intellect. an desire is the crucial task that the student must complete on the 27th path. The Tower symbolizes the beliefs which each person has built up through life since childhood those beliefs that were programmed into the child by parents, teachers, institutions and peers. The Tower is built in this fashion, one brick, one belief at a time and is fortified in adulthood like a tower under siege. The Tower is protected by the Ego from attack by other belief systems which disagree with it. Thus it becomes a closed armory, firmly shut against the free flow of expression from the outside as well as from the inside.
The Tower is struck by the lightning flash, which represents sudden illumination or realization. Thus the old "realities" are changed forever ... destroyed for all intents and purposes. The Lightning Bolt is Mars, for it is the force of Geburah in action, blasting away outmoded beliefs. (The process of inner growth is not pleasant, and must be painful at times.)
The crown at the top of the Tower is Kether, the head of the old belief system which is sheared off. The crown itself can also be seen as a phallic symbol alluding to the sexual energy of Netzach which is encountered on this path. The Dukes of Edom who fall from the Tower are the Lords of Chaos; imperfect forms which are sent back into the nothingness from whence they came. The Tower itself is of Eastern design because it alludes to the story of the Tower of Babel (the limitations of language and the confusions which arise from it).
The mouth at the bottom of the card refers to the Hebrew letter Peh, meaning literally mouth" which is the vehicle of language as well as vibration. It is the vibration of Geburah which tears the Tower apart.
The background of the card is mainly red, the color of the path of Peh, and the Trees of Light and of Darkness are depicted in the flashing martial colors of red and green.
[source: Golden Dawn Tarot, I think. I don't discriminate, when its good its good. But don't take it as an endorsement of the Golden Dawn]