>>39629

1. Some church, probably Armenian. Forgot.

2. Catholic church. We've went inside and sit on benches, but I didn't take any photos. I'm not a religious person, but thought that it would be a bad taste, especially when everyone around are very quiet. https://en.wikipedia.org/wiki/Church_of_St._Catherine_(Saint_Petersburg)
It is oldest catholic church in Russia. Pretty interesting place.

3. Kazan cathedral - https://en.wikipedia.org/wiki/Kazan_Cathedral,_Saint_Petersburg

4. Water, again. Church at center was build on the place where emperor Alexander II was killed.