Sincere interest in the history of one’s state, people, and culture in general is an indicator of the social health of society. You cannot predict the future, but you can, by studying history, learn to avoid tragic mistakes that cost too much both to society as a whole and to its individual citizens. Who are we? Where are we from? What lessons can we learn from our past? And who are they, the heroes of history, who can serve as an example to posterity? And are they always worthy of their memory? The Trubetskoys are an old princely and boyar family of Lithuanian and Russian princes. Representatives of this family were kings, governors, guardsmen, generals, musicians, diplomats and scientists. We know Trubetskoy the Decembrist, Trubetskoy the musician, Trubetskoy the linguist, one of the representatives of this numerous family was M. Yu. Lermontov’s second at his last duel. It is hardly possible to name such an eminent family, which gave us so many wonderful people whose lives are not leaves neither historian-researchers nor us, inquisitive readers, indifferent.