Constantine II called de Martis, was the giudice of Logudoro

Giudice of Logudoro

The giudici of Logudoro were the local rulers of the locum de Torres or region around Porto Torres, the chief northern port of Sardinia, during the Middle Ages.*Gonario I *Comita II *Barisone I *Andrew Tanca The giudici (iudices or judikes, "judges") of Logudoro (or Torres) were the local...

. He succeeded to the giudicato sometime between 1181 and 1191. He was the son of Barisone II

Barisone II of Torres

Barison II or Barisone II was the giudice of Logudoro from 1153 to 1186. He was the son and successor of Gonario II, who retired to the monastery of Clairvaux to live out his days....

 and Preziosa de Orrubu. His father associated him with the government in 1170 and abdicated the throne to him around 1186. His reign was generally characterised by contemporary chroniclers as "tyrannical."

In the year before Constantine's succession, Logudoro and Arborea owed allegiance to the Republic of Genoa

Republic of Genoa

The Most Serene Republic of Genoa |Ligurian]]: Repúbrica de Zêna) was an independent state from 1005 to 1797 in Liguria on the northwestern Italian coast, as well as Corsica from 1347 to 1768, and numerous other territories throughout the Mediterranean....

 and Gallura

Giudicato of Gallura

The Giudicato of Gallura was one of four Sardinian giudicati of the Middle Ages. These were de facto independent states ruled by judges bearing the title iudex . Gallura, a name which comes from gallus, meaning rooster , was subdivided into ten curatoriae governed by curatores under the judge...

 and Cagliari

Giudicato of Cagliari

The Giudicato of Cagliari was one of the four Sardinian giudicati of the Middle Ages. It covered the entire south and central east portion of the island and was composed of thirteen subdivisions called curatoriae. To its north and west lay Arborea and north and on the east lay Gallura and Logudoro...

 to that of Pisa

Republic of Pisa

The Republic of Pisa was a de facto independent state centered on the Tuscan city of Pisa during the late tenth and eleventh centuries. It rose to become an economic powerhouse, a commercial center whose merchants dominated Mediterranean and Italian trade for a century before being surpassed and...

.