In its most simple expression Nuraghe has the shape of a circular tower, with vertical truncated-conic profile surmounted by an over hanging balcony. It was built using very thick stonework, consisting of dry-big stones, sometimes rough, sometimes carved, which are placed in horizontal superimposed rows, in tighter and tighter circles from the bottom upwards.

Nuraghe Palmavera - Alghero
ImageNuraghe Palmavera - Alghero

The walls are built without cement. It is only the weight and position of the stones that keeps the walls standing. The stones are well tied in one to the other using a building technique based on experience which ensured that the walls would not fall down. When the stones were laid some were cut to shape in order to fit perfectly.

The inside of the nuraghi form a room covered with a dome shaped roof which is built in ogival section. The walls of the nuraghi are built in a concentric circular shape. The stones are laid with the largest stones at the bottom and the subsequent stones protruding one layer on the other in ever tighter circles until one or two stones finish the false dome.
The entrances are usually south facing but some are built with east or west facing entrances. These entrances are built using two piers and a lintel with a small window above the lintel.
The ground floor room is lit by the weak light that manages to filter in from outside. This room is reached by a corridor with a niche (the so called "garetta") on its right for the guard and on its left the entrance to the stair well which is built within the walls and is lit by a few small windows. This circular stairs leads to the upstairs rooms (if there are any) and to the balcony.
In the walls of the rooms there are niches and spaces cut out.
  Nuraghe Is Paras: false dome
ImageNuraghe Is Paras: false dome

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