Ortacesus is an Italian municipality of 862 inhabitants in the province of South Sardinia, in the historical territory of Trexenta. The area was inhabited in Nuragic and Roman times, witness the presence in the territory of several archaeological testimonies.
During the Middle Ages it belonged to the Giudicato of Cagliari and was part of the curatoria of Trexenta. At the fall of the Giudicato (1258) the territory passed briefly to the Giudicato of Arborea; Judge Mariano II in 1295 bequeathed the territories of the former Giudicato of Cagliari to the republic of Pisa, a fief of the Visconti. In 1324 the village passed to the Aragonese together with all the centers of the former curatoria of Trexenta and Gippi; in 1421 the village, with all the other villages of the former curatoria of Trexenta, was given in administration to Giacomo de Besora, who in 1434 obtained the feudal concession. In 1497 the village was united with the county of Villasor, a fief of Giacomo de Alagón. In 1594 the county was transformed into a marquisate.
In 1703 the fief was given by Artale de Alagón to his daughter Isabella married to Joseph da Silva. To the Da Silva – Alagon was redeemed in 1839 with the abolition of the feudal system.
From 1928 to 1946 it was aggregated, together with Guamaggiore, to the municipality of Selegas.
Source : https://it.wikipedia.org/wiki/Ortacesus#cite_ref-template_divisione_amministrativa-abitanti_1-0
