The Barri Gotic
The Barri Gotic also known as Gothic Quarter, is the oldest and the most popular neighborhood of Barcelona, and is the place where the medieval city of Barcelona was formed.

 It includes many of the medieval buildings, such as : 
the Cathedral of Sainte-Eulali 
La Casa de la Ciutat 
La Plaça Nova with two cylindrical towers dating from the Roman period 
La Plaça del Rei headquarters of Palau Reial Major which is a royal residence characterized by its streetlights and early works of Antoni Gaud
Plaça del Pi the most frequented place of the district, it extends to the edge of  "Born".