No wonder blogging is addictive. Such rewards. Collectively we know so much – my little corner of the blogging world has identified Oneov, and in less than 12 hours. Kudos go to Rustic Recluse. She wrote:
I have FINALLY identified the church, thanks to your comment about the reconstruction, and I spotted a little ship on the bottom right corner of the last picture! ❤ (Sorry, I’m a tad more excited than I should be!) I was so vested in your post I couldn’t stop staring, and slowly figured you were on the Neva River! It’s called Metochion of Kiev Pechersk Lavra. In English it’s known as The Church of the Assumption of the Blessed Virgin Mary, on Lieutenant Schmidt Embankment! I hope this gives you (and myself too!) some peace of mind!
Of course I followed with some additional googling and she is backed up by the Saint Petersburg encyclopaedia.