My brother and fellow webmaster Wim Voogd wrote a couple of posts about a deserted Ukraine complex he discovered in 1986. Here you can read about Kellia Timiou Stavrou or the Kelia of the Exaltation of the Cross (Exaltation de la Croix). The place was in shambles and all kind of papers, leaflets and even pasports were lying on the floor. Someone must have found these papers and letters and collected them because you can buy them, to my surprise, nowadays on Ebay. Most of these letters ar money letters, donations not only from Russia/Ukraine, but as you can see below, from all over the world .
This is the leaflet I found in 1986:
Here you see where this settlement is situated, with a recent picture from Panoramia.