It is very near the Christ Savior Cathedral - on the other side of the river (you pass through the new Patriarchal bridge) on the Bersenevskaya Naberezhnaya street. It is called Церковь Николы на Берсеневке (St. Nicholas Church in Bersenevka) from the 17th century.
There is another oldbelievers Church near Belorusskyi vokzal (railwaystation).
andreios
Byzantine Catholics in Slovakia [grkat.nfo.sk]