(Italian: Mariano II
1297) was the Judge of Arborea
1241 to his death. With skilled military action, he came to control
more than half of the island of Sardinia
By his control of the vast central plains and the rich deposits of
precious metals, he increased the riches of his giudicato
and staved off the general economic
decline affecting the rest of Europe at the time.
He was the son and successor of Peter II of Arborea
of the Bas-Serra family
and local woman named
Sardinia. He succeeded to the throne at a young age under the
regency of William of Capraia
distant relative. William was the son of Bina de Lacon, widow
of Peter I, and Hugh of Capraia, Count of Prato.
William and his brothers Anselm and Berthold were pupils at the
court of Peter II, who designated William regent for his son.
On William's death in 1264, Marianus did not take the full reins of
power, but instead had to recognise the co-dominion of William's
. In 1270, he
imprisoned Nicholas, and in 1274 had him killed and began to govern
himself, though he was soon opposed by Berthold's son Anselm
, who held Cagliari.
Marianus was a close ally of the Republic of Pisa
, the most powerful force
on Sardinia in the mid-thirteenth century, and received Pisan
citizenship on 17 June 1265. He often lived in Pisa and there he
met his wife, a daughter of Andreotto Saraceno Caldera
1287, he married his son John
Giacomina, daughter of Ugolino
, of whom he was a partisan. Marianus was
widowed by 1293.
In 1274, he embarked on a series of belligerent adventures to
extend his power into Cagliari and Logudoro
. He conquered Monforte on the Nurra and
restored it, leaving an epigraph now in the museum of Sassari.
1277, his conquests were recognised by Pope John XXI
. He had annexed part of Montiferru
as far as Monte
with all its castles. He thus divided the Logudorese
into a south and north. He was appointed
In 1284, Marianus solicited the aid of Peter III of Aragon
to retake Cagliari.
In 1287, Anselm was defeated and killed.
On 4 January 1295, he made a political about turn and left the
third part of Cagliari to Pisa. A little later, he took part with
in-laws in the siege
of Villa di Chiesa
, defended by the
. He was wounded and took refuge in San Leonardo di Siete Fuentes,
where, according to some sources, he was poisoned in 1297 by the
Pisans who wanted to extend their authority in Cagliari to the
Argentiera of Cixerri.
Asides from his son and successor, John, he left a daughter and an
illegitimate son named Barisone (died 1305).