- Sergiyev Posad The town of Sergiyev Posad, known as Zagorsk during the Soviet era, is a small industrial and agricultural city about an hour from Moscow. It is most famous for its spectacular fortress monastery, the Trinity Monastery of St. Sergius, an important center in the Orthodox world. Pictured at the top of the page, a woman confers with a monk on the monastery grounds; just above, a ...www.midwinter.com/~koreth/russia/posad