They say 370,000 people have signed up to take part . While the political battle continues between Spain 's two largest cities , Madrid and Barcelona , the human chain has emerged as the latest rallying point . The chain is expected to stretch for 400 kilometers ( about 250 miles ) Catalan ##s are calling for a referendum on self - rule by the end of 2014 . But the Spanish government says that Catalonia already has sufficient self - governing territory .
They say 370,000 people have signed up to take part . The chain is expected to stretch for 400 kilometers ( about 250 miles ) Catalan ##s are calling for a referendum on self - rule by the end of 2014 . But the Spanish government says that Catalonia already has sufficient self - governing territory .