Prince Sergei Fedorovich Golitsyn, having met withIvan Andreevich, suggested that
he become his home teacher and personal secretary.
And it came to pass that in the process of preparation of the material about the helmet of yaroslav vsevolodovich, i had to face the problem of lack of photos as well as photos of"The helmet of alexander nevsky",
and in fact the helmet of the tsar Mikhail Fedorovich romanov.