The controversial vote went ahead despite the Government deeming it illegal
Catalan officials now say 844 people were injured after police used rubber bullets and batons to stop a ballot for independence.
A banned referendum took place throughout the region today with violent clashes between police and voters.
The Catalan government claims the use of batons amounted to "unjustifiable violence" - which created a "terrible image of Spain".
But Spanish Prime Minister Mariano Rajoy says the police acted admirably:
Journalist Tim Parfitt, who's based in the city, says the levels of violence were unprecedented: