Patriarch Varnava Rosić was born in Pljevlja, Montenegro, on August 29, 1880. He was the Head of Serbian Orthodox Church between 1930 and 1937. His birth name was Petar Rosić.
During the archipastoral rule of Patiarch Varnava, church life was on the move in all regions. Many monasteries, churches and church buildings were erected. Varnava firmly resisted the introduction of legislation giving greater privileges to the Roman Catholic Church in Yugoslavia (The Concordat Crisis). He died unexpectedly during the night between July 23–24, 1937 when the Concordat legislation was carried into Parliament. Many people believed that Patriarch Varnava was poisoned because of his struggle against Concordat, and his death is still unresolved. The Patriarch was buried in the little church of St. Sava in Belgrade.