He opened the first official Academy of Painting on the territory of the Metropolitanate of Karlovci after the artistic and cultural reforms were commenced under the auspices and blessing of Vikentije Jovanović, his predecessor.

The previous Patriarch Arsenije IV moved north to the Habsburg monarchy along with many Serbs, in what is known as the Second Serbian Migration.

Arsenije IV became Metropolitan of Karlovci, maintaining however deep connections with the Serbs who remained in the Ottoman Empire, particularly the Kosovo Vilayet, now under the Phanariote jurisdiction of Joannicius.

Joannicius remained Patriarch of Peć until 1746, when, burdened with debts due to his high-living, he was forced to sell the title to pay his creditors.

[3] Another style was "Archbishop of All Serbs, Bulgarians, Western Pomorje, Dalmatia, Bosnia, both halves of Danube and all of Illyria".