But it's the words of Ilya Oskolkov-Tsentsiper, the co-founder of the Strelka, that echo most in my ears. In Russian history, he says, there's an old tradition of mad, half-witted saints. "This idea that it's only the crazy, half-witted fool who can tell the truth to the nation and to power. There is something that all Russians know even if they're not aware of it. In Russia, you never call it St Basil's Cathedral, it's Vasily Blazhenny, Vassily the Mad. And this is what these girls are. The truth-tellers to the Russian nation."
We're sitting at a table in Strelka while he tells me this, a beautifully designed space right opposite the Cathedral of Christ the Saviour, scene of the crime. "I remember swimming in that pool as a child. And sometimes, I have a feeling that in another 70 years the pool will have to be restored. And we will live through this endless cycle of destroying the churches and then rebuilding them."