The famous monastery of Troitskaya-Sergeeva or, to use its full name, the Laurel of St. Sergius under the Blessing of the Holy Trinity, was about forty-five miles northeast of Moscow on the Great Russian Road, which leads from the capital to Great Rostov and then to Yaroslavl on the Volga. The origins of this hallowed and historic place lay in the fourteenth century, when it became the site of a small wooden church and monastery founded by a monk named Sergius, who blessed Russian armies before the great Battle of Kulikovo, against the Tatars. When the Russians won, the monastery became a national shrine. In the sixteenth century, Troitsky became rich and powerful. Dying tsars and noblemen, in hopes of salvation, bequeathed their wealth to the monastery, and its treasure vaults were choked with gold, silver, pearls, and jewels. Huge white walls, from thirty to fifty feet high and twenty feet thick, circled the monastery for a mile in circumference, making it impregnable. From the ramparts and from the immense round towers which stood at the corners, the muzzles of scores of brass cannon looked out on the countryside. In 1608 and 1609, during the Time of Troubles, the Troitsky withstood a siege by 30,000 Poles, whose cannonballs simply bounced off the monastery’s massive walls.
[the footnote] Today, the monastery is commonly called Zagorsk, after the industrial town that now spreads beneath its walls. An oasis of religious life in Soviet Russia, it is, as it has been for centuries, an attraction for pilgrims from all over Russia. As one of the richest assemblages of religious architecture to be found in the Soviet Union, it has also become a regular stop for most foreign tourists who visit Moscow. Happily, even now [1980], Troitsky still exudes something of the beauty, the grandeur, and the holiness of its past.
From: Peter the Great: His Life and World by Robert K. Massie; paperback edition (New York: Ballantine Books, 1986), pp. 101-102. Originally published in 1980.