I invite you to make an exciting journey into the mysterious world of Gothic cathedrals, which is full of hidden symbols. Cathedrals - "open-air encyclopedias" - speak a special language with each visitor. And the chapters of the book will tell you about the connection between art and history, what is a cathedral, Romanesque and Gothic style, consider the themes of iconography, all technical problems and creative solutions, sources of funding. You will visit a "different" story, plunge into an alternative etymology, find out what "total" alchemy is. In cathedrals, in these majestic buildings filled with light and air, knowledge of sacred numerology and engineering is embodied. To penetrate their secret, you need to comprehend what is hidden behind the "sign."