Polygonal masonry

Segni (, ) is an Italian town and comune located in Lazio. The city is situated on a hilltop in the Lepini Mountains and overlooks the valley of the Sacco River.

thumb|right|Sideways view of the walls of Sacsayhuamán showing the details of the stonework and the angle of the walls. thumbnail|Muyuq Marka thumb|Close up of stone wall

ancient town

Cosa was an ancient Roman city near the present Ansedonia in southwestern Tuscany, Italy. It is situated on a hill 113 m above sea level and 140 km northwest of Rome on the Tyrrhenian Sea coast. It has assumed a position of prominence in Roman archaeology owing to its excavation.

ahu on Easter Island

dry stone masonry technique in which the visible surface of building stones are dressed with straight sides, giving the wall face the appearance of adjoining polygons.

Norba, an ancient town of Latium (Adjectum), Italy. It is situated 1 mile northwest of the modern town of Norma, on the western edge of the Volscian Mountains or Monti Lepini. The town is perched above a precipitous cliff with a splendid view over the Pomptine Marshes below; the highest point stands to ca. 460 meters (over 1500 feet) above sea level. thumb|Map of Norba