Храм Спаса на Крови, or Church of the Saviour on Blood is an incredible place. The outside is ornate and stands out against the St Petersburg architecture, but the inside is just amazing. I took a photo sphere picture of the inside but I can’t share it here.
On the inside the entire surface is covered with tiny mosaic tiles. There are huge freezes of religious scenes which have been painstakingly created with tiny coloured tiles. I’ve laid a few tiles in my time and I reckon I was petty good at it, but this was mind blowing.
The church was built where Tsar Alexander II was assassinated and is dedicated to his memory. I’m not sure what the difference between an assassination and a murder is, not much for the victim that’s for sure! Maybe it depends how famous you are? Something to Google on a rainy day.