What is "gazarta"

The Chaldean diocese of Gazarta, named for the town of Jezira (modern Cizre), known in Syriac as Gazarta d'Beth Zabdai, was established on a stable basis in the early nineteenth century. Many of the Assyrians of the Gazarta region, including the bishop of Gazarta Pilipus Yaqub Orahim, were killed during the Assyrian Genocide during 1914-1918, and the diocese lapsed after the First World War.