Emperor Alexander I can undoubtedly be called the most mysterious and controversial figure among the Russian sovereigns of the 19th century. A republican by conviction, he occupied the Russian throne for a quarter of a century. The winner of Napoleon and the liberator of Europe, he went down in history as Alexander the Blessed - however, contemporaries, and later historians and writers accused him of weakness, hypocrisy and other vices unworthy of the monarch. Mysterious, finally, the circumstances of his death. The famous writer and publicist Alexander Arkhangelsky tells about the riddle of Emperor Alexander in his book.