CHARACTERISTICS OF THE STRUCTURE

A) MATERIALS:
     
The materials that they used to build the great wall were taken of the neighbour territories.

Near Beijing they used the clacareous stone. For example the Cathedral of Girona it's made with   calcareous stone too.  In another places used granite or brick baked. 

This materials were very resistant to the arms.

Calcareous stone

Granite

     

Brick baked

B) SHAPE:

It has got the shape of arch, there are lots of steps.
 Along the wall, there are battlements in catalan "merlets", it has got defensive spaces of a bit more   than 30 centimetres of height and arround 23 centimetres of wide. 
   

C) TYPE OF STRUCTURE

Is a militar construction that it was used to protect the village. 

There weren't lots of problems to construct this building, but the wall was build by parts so the     
first part some years later it was old and this parts broke, and then they had to rebuild.