In first place we are going to define what a city is: a city is a type of landscape with anthropic elements that consist in a group of streets and buildings governed by a town hall with a large population. The city we are going to analyze is located in the north east of Spain. This city has mediteranean coasts and it is near the Pirinees. It´s named Barcelona, there are many theories about the name but the most accurate is that Barcelona´s name evolved in the middle ages during the Julio Cesar roman colony. Barcelona is one of the most turism cities of Europe with lots of shops, museums, monuments and hotels. In the other hand, the historic Center call also (Ciudad Vella) has a layout with narrow and winding streets. This part of the city is surrounded with walls built by Romans (s. I a. C. ). The wall has 81 towers that were use to defend from the enemies. Outside the walls there are many neighborhoods such as Gracia, Sant Marti, San Andreu, San Montjuïc, Les Corts... ...