With almost thirty thousand inhabitants, it is the eighth most populated town in Sardinia. Selargius is part of the metropolitan area of Cagliari, practically joined to the capital city. Perhaps of Roman origin, in the Early Middle Ages it was Kellarios, from the Latin cellarium (agricultural depot). Work in the fields, the town’s historical activity, lives again in the agri-food products: wine, particularly Monica and Nasco, homemade bread and pasta, local almond pastries (macaroons, gueffus, pistoccus), Is pardulas and the very famous Selargius capers.

In the Aragonese period, the municipality was a huge fortified 'barricade' defending Carali: a square with sides 200 metres long and a moat corresponding to the bed of a torrent. The old town centre preserves its memory, consisting of Campidano houses, built with ladiri, raw bricks, and featuring large portals, courtyards and covered loggias, Is Lollas. The most beautiful and well-kept ones are in Via Roma, where you can also visit the seventeenth century prison of the marquises of Quirra.