Subject of photograph

Here is the short version of my biggest coincidence story: I became friends with someone while on a tour of Yugoslavia. I am from California, she is from New York. Several months later, she gave me a gift, a book of photographs by Roman Vishniac of Jewish scenes in Europe before the Holocaust. One of the pictures in the book, of Vienna in 1936, includes my grandparents' shoe store. Now for some of the details: Here is what had to happen to bring this about: This photo had to be taken from the vantage point it was taken, not the other side looking back the other way - the main subject was the shop next door to my grandparents'. It then had to be to among those that survived when 75% or more were lost or destroyed. This photo had to be selected for inclusion in the book, out of thousands. There are only about 200 there, and furthermore, almost all of them are from Poland, with only two or three being of Vienna. Someone had to think I might like this book, knowing nothing about any of these details. I had to take a long and careful look at that photo to notice that the sign on the shop next to the one featured (which is hard to make out) bore my family name. And that my father could remember 50 years after the fact the address number of the shop, which is more prominent in the photo. And furthermore, there is a selection of just some of photos from this book online, hosted by some school in Italy, with Italian translations of the captions, which I found by searching on "Vishniac Vienna", and Vienna is the same in English as Italian. Had it been French, it would be "Vienne" and I might not have found it. The photo is here: http://www.liceoberchet.it/eventi/vishniac.htm#11 The sign in question is above the man in the white shirt. Regarding other coincidences: I have frequently run into random acquaintances in far flung locales, such as crossing paths in a London gallery with someone I went to school with in California years before, or in airports, and such. In every one of those cases but one, it was I who spotted and recognized the other person. Only once did someone spot me - and - coincidentally - that was also a result of that same Yugoslavia tour. A year later I was in Washington DC, and was spotted in the lobby of the Kennedy Center before attending a play. Someone else from that tour was attending the same play, and when we took our seats, I was directly in front of them. I think these things happen all the time, but often go unnoticed because the people involved are "looking the other way", or "engrossed in conversation" or just not very observant.