It has got a lot of history, most of it troubled.
It all went wrong after the Roman Empire gave bits of Catalonia to retiring officers as payment for loyalty.
When the Roman Empire stared to crumble Rome called on these people they had bestowed bits of Catalonia on, but they failed to answer the call and in some case turned against Rome.
The feud between the Catalonians and the Spanish ahs been going on for centuries and the possibility of civil unrest against the Spanish is always on the horizon.