[RBerenguel]

Barça is only used for the football team, the city is Barcelona, Bcn (for short) or "down there" if you are not in the area but still in Catalonia

[tluyben2]

Did not know that. Noted for the future!

[bitL]

Barna is the short name of the city ;-)

[RBerenguel]

I think only people from the city or longing to be part of the hip people actually use Barna in speaking or writing. At least this is my experience.