St Paul's Cathedral

Now: guide live in 3 cities, City Coins and the influencer marketplace; pre-registration open.
Next: company set-up, legal review, choice of blockchain and smart contract audit.
Then: white paper notified to the AMF and published; EU offer opens to pre-registered people first.
After: waves A to D of city launches; other countries as local rules allow.

Christopher Wren's domed cathedral, with the Whispering Gallery.