Prokopije or Procopius (Serbian: Прокопије; Romanian: Procopie or Romanian: Procopiu, Hungarian: Prokop; born Petar Ivačković, Serbian Cyrillic: Петар Ивачковић, Romanian: Petru Ivacicovici, Hungarian: Ivácskovics Péter; August 8, 1808 – May 11, 1881) was an Austro-Hungarian cleric of the Romanian Orthodox and Serbian Orthodox churches who ultimately served as the latter's Patriarch at Karlovci. He was born in the Banat as a subject of the Austrian Empire, his ethnic affiliations alternating between the Serb and Romanian communities. Ivačković's early life was spent in Serbian Orthodox institutions, and he was seen as a Serb loyalist before he became Bishop of Arad. During the 1860s, he expressed support for Romanian nationalism, primarily as a founder of the National Aradian Association f