In which European city would you find a restaurant called "Els quatre gats"?

Player #7106191, it is written in Catalan, not in Castellano. Catalan is spoken in Barcelona, among many other regions of Spain :)

Player #8228285, Catalan is spoken almost for 4 million people. Basque and Galician are also Besides Castilian , the other official languages .

must be wicked expensive.