The Ottoman wars in Europe caused a number of Christian refugees, mostly Serbs, to migrate to the Military Frontier of the Habsburg Monarchy (in south-central Croatia and in most of Slavonia) during the 16th and 17th centuries. The population was by and large faithful to the Serbian Orthodox Church, but the Roman Catholic Church accorded them a Byzantine vicar of the Latin Bishop of Zagreb in 1611. The Byzantine vicar was based in the monastery of Marča (located near Ivanić Grad, southeast of Zagreb) which would later become a center of controversy between the Uniates (who preferred Roman jurisdiction) and the Orthodox (who preferred jurisdiction of the Patriarch of Serbia). It is recorded that in 1735, the believers protested the Uniates in the monastery and it passed to the Orthodox; but in 1753 it was restored to the Uniates. The Križevci eparchy was finally erected in 1777 after a long bout with the Serb Orthodox clergy.
In 1646 some Byzantine priests from the Eparchy of Mukačevo in Carpathian Ruthenia and several other locations returned to full communion with the Bishop of Rome. The Union of Uzhorod, as it is called, has its origins in the Council of Florence (1439) plan to bridge the Schism and encourage full communion of Eastern Orthodoxy with the Holy See, and eventually led to the foundation of the eparchies of Križevci (Pope Pius VI on June 17, 1777), Presov (1818), and Hajdudorog (1920). The Orthodox Serbs resisted, particularly in the metropolitan of Karlovci, Arsenije III Čarnojević. However a regiment of Orthodox of the Žumberak regiment of the Military Frontier accepted.
Križevci, the location of the see, is a town northeast of Zagreb. The new bishop was initially suffragan to the Primate of Hungary, and later (1852 or 1853) to the Latin Archbishop of Zagreb.
The Eparchy of Križevci was expanded after World War I to include all Byzantine Catholics in the former Yugoslavia. Owing to this expansion and to population movements over time, Križevci includes Catholics of varied national heritage including:
Today the eparchy includes between 50,000 and 77,000 Byzantine Catholics. However the last census in the Republic of Croatia, in 2001, listed only 6219 Greek-Catholics. This represents a sharp decline in numbers, particularly in the general vicinity of Zumberak. Such decline is explained by a number of factors including: 1) emigration, particularly to the United States (including Cleveland, Chicago and Pittsburgh) from the 1880s to the 1920s, and 2) rural depopulation and in particular, the exodus to Zagreb particularly in the period following the second world war. Living outside the native area has resulted in the creation of small, fragile and often isolated communities of Greek Catholics. Under such conditions, most Zumbercani of the Greek Rite are now Latin Rite Catholics.
The first Byzantine Catholic priest from Croatia came to the United States of America in 1902, whose work among Byzantine rite Croatians in Cleveland was encouraged by the bishop of Križevci. Another Croatian priest came to Allegheny, Pennsylvania, in 1894.
Križevci is one of the four Eastern European eparchies that are the roots of the Eastern-rite Catholic Churches in the United States.
"During World War II, the Slovak State suspected the Greek Catholic Redemptorist of anti-State propaganda since they were helping Ruthenians in a Slovak nationalist situation."
"Methodius Dominic Trcka, ... superior of the Redemptorist community in ... Eastern Slovakia, [was active] in the three Eparchies of Presov, Uzhorod and Križevci. With the arrival of the Communist regime, he was deported to a concentration camp with his Redemptorist colleagues."