Overview
Marianus IV (in Sardinian: Marianu IV de Arbarèe, in aragonese: Marià IV d'Arborea, 1319–1376), called the Great, was the Judge (king) of Arborea, kingdom in the island of Sardinia, from 1347 to his death. He was, as his nickname indicates, the greatest sovereign of Arborea. He was a legislator and a warrior whose reign saw the commencement of massive codification of the laws of his realm and incessant warfare with the Crown of Aragon. He was also a religious man, who had connections to Catherine of Siena. He was, in short, an "wise legislator, able politician, and valiant warrior."
Early life in the Kingdom of Aragon
Born at Oristano, he was the son of Hugh II and successor of his brother Peter III. At the behest of his father he spent most of his youth in Barcelona, where he was educated at the court of Alfonso IV of Aragon. He participated actively in the coronation of Peter IV in 1336. In 1336 in Barcelona, he married Timbora, daughter of Dalmatius IV of Rocabertí and Beatrice of Serrallonga, Baroness of Cabrenys. In 1339, he was invested by Peter with the counties of Goceano and Marmilla, in Sardinia.
In 1347, the Doria rebelled and defeated the Aragonese at Aidu de Turdu, occupying Bonorva. This sparked a long war between Aragon and Genoa, but at the outset the Doria could not take advantage of their victory. On 11 September 1349, he returned to Oristano, two years after succeeding his childless elder brother. One of his first acts was to repopulate the town of Goceano, rebuild the castle there, and plant a florid garden.
War with Aragon
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