The Gothic Quarter - was marked by the point where the two main streets, the Cardo and Decumanus, converged. The original Quarter Gothic centre, the Plaça del Rei proudly showcases the architectural ensemble made up of the royal residences of the Catalan-Aragonese monarchs. One can enjoy the charm of old Barcelona and the luxury of some of the most elegant buildings in the of Roman and medieval Barcelona still form the core of 21st-century. Its maze of narrow streets and squares is steeped in the city's past and present. Gotic neighbourhood.