jigsawpuzzle

In the puzzle I see the main entrance of a castle. I can also appreciate a little bit of where the castle is located and it’s sorroundings Stone Three types of uses are given to the stone. First the entrance, second the wall that closes the perimeter of the castle and finally the building.
 * What do you see in the puzzle?
 * What is the material used?
 * How many types of uses are given to the material?