"Caixa" is now one of the big banks in Spain.They used to be a building society and had to redploy profit in order to maintain society status. One of the things they did was to redevelop buidings in major cities and turn them into cultural centres of various sorts. This one in Barcelona is Science based and is where Sharon's science conference was held. It is at the foot of the Tibidabo mountain where the Fun Park is. If you have kids, the CosmoCixa and the Fun Park make a good day out.