What do Russian people associate with the image of distant and mysterious Persia-Iran? First of all, these are the kings Cyrus and Darius, who have forever entered our memory since school. The sad fate of A.S. Griboyedov, who died in Tehran during his diplomatic service, and in connection with this event - the Shah diamond, which has left a lot of legacy in world history. The famous Tehran Conference with the participation of the three great powers and the construction of the nuclear power plant by the Russians in Bushehr, and, of course, the Persian cat, carpets and the famous Iranian henna, popular among Soviet women. In our book we will touch on the historical mysteries of old Persia, read several bright pages from its history and, who knows, maybe we will reveal another secret to humanity...