There are lots of art centres and museums here in BCN.
and this structure is just one of them.
It was hard to find its historical structure though,
If anyone has more info about it, feel free to share. ^0^
from its exterior,
Centro Aragones is its name,
perhaps, a local theatre here.
and a plaque that said:
* where was this *
Carrer de Torres I Amat-BCN