This will be remembered for hundreds of years just like Tiananmen Square 1989, Budapest 1956, Crystal Night 1938, and even Stockholm Bloodbath 1520.
I think that is a bit much to compare todays events to the above. Tianamen Square hundreds were murdered likewise Kristallnacht. Lets not over react on that scale !
The refendum was illegal. Personally I think they should have let them have it then declared it invalid. What Spain did today was heavy handed and they lost a lot of credibility. Scenes of elderly people being beaten and bleeding was a sad day for Spanish democracy. It is simply unacceptable for this to be allowed in a EU country in 2017. Note the lack of response from the rest of the EU by the way.
It seems just over 2 million votes were cast ( according to the Catalan authorities ) and of those 90% voted Yes. Keeping in mind over 5 million voters are in that region of Spain. Then of course you have those who are Catalans who want to remain Spanish. So we really do not have a reliable figure on the true results should there be an official referendum.