Editing Cagliari (section)

===14th to 17th centuries===
{{Main|Kingdom of Sardinia}}
In the second decade of the 14th century the [[Crown of Aragon]] [[Aragonese conquest of Sardinia|conquered Sardinia]] after a series of battles against the [[Pisa]]ns. During the siege of Castel di Castro (1324-1326), the Aragonese, led by [[Alfonso IV of Aragon]], built a stronghold on a more southern hill, that of Bonaria.
[[File:Braun_hogenberg_Cagliari_1572.jpg|thumb|View of Cagliari from ''Civitates orbis terrarium'' (1572) by [[Georg Braun]]]]
When the fortified city was finally conquered by the Aragonese army, Castel di Castro (''Castell de Càller'' or simply Càller in [[Catalan language|Catalan]]) became the administrative capital of the newborn [[Kingdom of Sardinia]], one of the many kingdoms forming the Crown of Aragon, which later came under the rule of the [[Spanish Empire]]. After the expulsion of the Tuscans,{{sfn|Casula|1994|p=304}} the Castello district was repopulated by the Aragonese settlers of Bonaria while the indigenous population was, as in the past, concentrated in Stampace and Villanova.

The [[kings of Sardinia]], also [[kings of Aragon]] and later [[kings of Spain]], were represented in Cagliari by a [[List of viceroys of Sardinia|viceroy]], who resided in the [[Palazzo Regio]].
[[File:PalazzoRegio3.jpg|thumb|Interior view of the [[Palazzo Regio|Royal Palace of Cagliari]].]]

In the 16th century the fortifications of the city were strengthened with the construction of the [[bastion]]s and the rights and benefits of the Aragonese were extended to all citizens. The intellectual life was relatively lively and in the early years of the 17th century the university was founded.