|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, Deximu Mannu in Sardinian language, is a comune (municipality) in the Province of Cagliari in the Italian autonomous region of Sardinia, the second-largest island in the Mediterranean Sea (after Sicily).
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.
The Republic of Pisa captured Sardinia in 1017 with the defeat of the Saracen leader Mugahid. This victory gave Pisa supremacy until the victory of the Aragonese (from the Iberian Peninsula) in 1323. Decimomannu was annexed to the giudicato of Arborea in 1353. In 1409, Martin I of Sicily, heir to Aragon, defeated the last Sardinian giudicato. As he died without issue, Sardinia passed with the Crown of Aragon to a united Spain.
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- All demographics and other statistics: Italian statistical institute Istat.