Barcelona bets on ‘digital twin’ as future of city planning

In five years’ time, the structure of Europe’s cities won’t be decided in local town halls but inside a quiet 19th-century chapel in a leafy neighborhood of Barcelona.

Housed in the deconsecrated Torre Girona chapel, the MareNostrum supercomputer — one of the world’s most powerful data processors — is already busily analyzing how to improve city planning in Barcelona.