School historian Nikolay Bulytsky is, in the distant past, one on his own and unarmed in the world of Ancient Rus’. A not-so-young contemporary from our time is ready, in word and deed, to stand in the way of Mongol hordes. Not everyone likes his planned “industrialization” in the 14th century, but a man who managed to gain the patronage of Dmitry Donskoy and Sergius of Radonezh still can do more than that…