Bartholomew was consecrated a
bishop, in charge of the city of
Maragha. Arriving around 1318–1320, he learned the local language, built a monastery, and set to work converting many Armenians, including
Nestorians and
Muslims. Bartholomew's work as bishop came to the attention of
John of Kherna, the head of a nearby monastery, who sought him out in 1328. The two men worked together for a year and a half, culminating in a conference in Kherna. As a result, John, along with a large number of his monks, converted to
Catholicism. In 1330, with Bartholomew's support, John founded the "Uniats of St Gregory the Illuminator", which later became part of the Dominican order. Soon after, Bartholomew moved as
bishop to
Nachidiewan. == Works ==