Balearic politicians clash over Catalan independence as crisis sharpens ahead of vote
Thousands of police pour into Barcelona as authorities prepare for possible violence
Catalonia vows it will hold independence referendum in September
It comes after the latest polls show 47% of Catalans support independence
Catalonia leaders accused of frustrating attempts to return priceless Romanesque artworks
Catalan leaders are being accused of undermining attempts to repatriate priceless Romanesque frescoes