The Middle Ages in Europe lasted a whole millennium and included a lot - the Crusades and the growth of cities, the miracles of saints and the fires of heretics, the songs of troubadours and the grandeur of Gothic cathedrals. In this kaleidoscope of facts and events, it is difficult to discern how ordinary people of that era lived, what they believed in, what made them commit those cruel, merciful and extravagant acts that still surprise us today. This is the subject of a book by the historian and philosopher Leonid Petrushenko, which describes how the worldview of a medieval man was reflected in his behavior - in church and in war, at school and at a knightly tournament.