|Comune di Decimomannu|
Platform at Stazione di Decimomannu
|• Total||28.1 km2 (10.8 sq mi)|
|Elevation||12 m (39 ft)|
|Population (Dec. 2004)|
|• Density||250/km2 (650/sq mi)|
|Time zone||CET (UTC+1)|
|• Summer (DST)||CEST (UTC+2)|
Decimomannu is located about 17 kilometres (11 mi) northwest of Cagliari, with a population of about 7,831 (2011 census).
Decimomannu's origins date back at least to Roman times, as attested by its Latin name, meaning "the biggest town located ten miles from Cagliari". Its earlier history was revealed when a necropolis from Phoenician-Punic times was found in 1879–80.
After belonging to the Byzantine Empire, in the Middle Ages it became part of the Giudicato of Cagliari, The Giudicati were the indigenous kingdoms of Sardinia from about 900 until 1410, when the last fell to the Aragonese. The giudici (Latin iudice, literally "judge") were rulers of the giudicati, and many of the giudici established their residences in Decimomannu.
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- All demographics and other statistics: Italian statistical institute Istat.