In the book, the authors continue the story of the great "Mongol" conquest of the XIV century, focusing on the personality of the person under whose leadership this conquest was completed - Grand Duke Ivan Danilovich Kalita. He's Ivan Kalif. In addition, from a new point of view, the most famous medieval works were analyzed - "Journey to the Court of the Great Khan" by Plano Carpini and "Book on the Diversity of the World" by Marco Polo. Here the reader will find a lot of new and unexpected things. It is also told about what the famous seven wonders of the world are, according to the reconstruction of the authors.