About the book: 2023 / The present, fifth book of "Rus and Rome" is dedicated to the turbulent events of the late XIV century - the Battle of Kulikovo, the invention of gunpowder, the adoption of the apostolic Christianity and the largest restructuring of the entire life of the Empire. The main characters of that era are Dmitry Donskoy, aka Constantine the Great, and Saint Sergius of Radonezh, a great natural scientist, inventor of gunpowder and cannons. The discovery of gunpowder in the apostolic monasteries ensured the defeat of the undefeated troops of the Empire in the Battle of Kulikovo and the complete victory of the Apostolic Christians. Subsequently, the city of Moscow was built on the site of the Battle of Kulikovo. The book is intended for all those interested in the New chronology. It reflects the latest achievements of the authors in the field of reconstruction of world history.