I am going to quote from my own review of this deck to start: "The majors especially show the crucifixion in many of cards. It is the main theme of Judgement, but it appears often in the background, appearing in the bark of a tree, in the clouds or just casually woven into the busy backgrounds. Nails are also a prominent feature, as is the Christian Rose. The obsession of that era with death and skeletons, and even bones is very prominent as well. Curiously, pagan symbolism is mixed in with the Christian, many of the figures having the horns of the nature god. The Templars were very devoted Christians, if possibly somewhat secretive (with good reason) and obsessive."
The Christian era of the time showed a powerful obssession with death, and the use of bones and skeletons. But to me the most important feature is the depiction, over and over of the crucification. And the next most important feature is the use of wings. "Angels are present in many cards, but often in 'shocking' ways. With wings damaged, or destroyed. These are not the angels of the "Healing with Angels" cards. These angels are struggling and suffering. Even the devil is shown with red, distorted angel wings. Nonetheless, these images give the deck great power and strong vision. Despite the strong, if muted, colours, I would say this is a deck with a darker vision of life."
This deck has very strong themes and I would enjoy further discussions of them.