Islam kept its ground among the Bashkirs of Hungary until 1340, when King Charles Robert compelled all his subjects that were not yet Christians to embrace the Christian faith or quit the country.[78]

The Serbian Muslims may, therefore, well have been pleased to escape from the rule of Hungary, like their Christian fellow-countrymen, for when these were given the choice between the Roman Catholic rule of Hungary and the Muslim rule of the Turks, the devotion of the Serbians to the Greek Church led them to prefer the tolerance of the Muslims to the uncompromising proselytizing spirit of the Latins.

An old legend thus represents their feelings at this time :—The Turks and the Hungarians were at war; George Brankovich sought out John Hunyady and asked him, " If you are victorious, what will you do ? " " Establish the Roman Catholic faith," was the answer. Then he sought out the sultan and asked him, "If you come out victorious, what will you do with our religion? "By the side of every mosque shall stand a church, and every man shall be free to pray in whichever he chooses."[79] 

The treachery of some Serbian priests forced the garrison of Belgrade to capitulate to the Turks;[80]  similarly the Serbians of Semendria, on the Danube, welcomed the Turkish troops who in 1600 delivered them from the rule of their Catholic neighbors.[81]

The spread of Islam among the Serbians began immediately after the battle of Kossovo, when a large part of the old feudal nobility, such as still remained alive and did not take refuge in neighboring Christian countries, went over voluntarily to the faith of the Prophet, in order to keep their old privileges undisturbed.[82]

In these converted nobles the sultans found the most zealous propagandists of the new faith.[83] But the majority of the Serbian people clung firmly to their old religion through all their troubles and sufferings, and only in Stara Serbia or Old Serbia,[84] which now forms the north-eastern portion of modern Albania, has there been any very considerable number of conversions.

Albanian colonists from the south pressed into the country vacated by the fugitives : these Albanians at the time of their arrival were Roman Catholics for the most part, but after they settled in Old Serbia they gradually adopted Islam and at the present time the remnant of Roman Catholic Albanians is but small, though from time to time it is recruited by fresh arrivals from the mountains : the new-comers, however, usually follow the example of their predecessors, and after a while become Muslims.[86]

After this Albanian immigration, Islam, began to spread more rapidly among the remnant of the Serbian population. The Serbian clergy were very ignorant and unlettered, they could only manage with difficulty to read their service-books and hardly any had learned to write; they neither preached to the people nor taught them the catechism, consequently in whole villages scarcely a man could be found who knew the Lords Prayer or how many commandments there were; even the priests themselves were quite as ignorant.[87]

After the insurrection of 1689, the Patriarch of Ipek, the ecclesiastical capital of Serbia, was appointed by the Porte, but in 1737, as the result of another rebellion, the Serbian Church made dependent upon the Greek Patriarch of Constantinople. The churches were filled with Greek bishops, who made common cause with the Turkish Beys and Pashas in bleeding the unfortunate Christians: their national language was proscribed and the Old Slavonic service-books, etc., were collected and sent off to Constantinople.[88]

In the district of Opolje, the present Muslim population of 9500 souls is probably for the most part descended from the original Slav inhabitants of the place.[90] At the beginning of the seventeenth century, Bizzi found in the city of Jagnevo, 120 Roman Catholic households, 200 Greek and 180 Muslim;[91] less than a hundred years later, every house in the city was looked upon as Muslim, as the head of each family professed this faith and the women only, with some of the children, were Christian.[92]

About the middle of the eighteenth century, the village of Ljurs was entirely Catholic; in 1863 there were 90 Muslim and 23 Christian families, but at the present day this village, together with the surrounding villages, has wholly adopted Islam.[93] Until recently some lingering survivals of their old Christian faith, such as the burning of the Yule-log at Christmas, etc., were still to be met with in certain villages, but such customs are now fast dying out.

After the battle of Kossovo and the downfall of the Serbian empire, the wild highlands of Montenegro afforded a refuge to those Serbians who would not submit to the Turks but were determined to maintain their independence. It is not the place here to relate the history of the heroic struggles of this brave people against overwhelming odds, how through centuries of continual warfare, under the rule of their prince-bishops,[94] they have kept alive a free Christian state when all their brethren of the same race had submitted to Islamic rule. While the very basis of their separate existence as a nation was their firm adherence to the Christian faith it could hardly have been expected that Islam would have made its way among them, but in the seventeenth century many Montenegrins in the frontier districts became Muslims and took service with the neighboring Pashas.

But in 1703, Daniel Petrovich, the then reigning bishop, called the tribes together and told them that the only hope for their country and their faith lay in the destruction of the Muslims living among them. Accordingly, on Christmas Eve, all the converted Montenegrins who would not forswear Islam and embrace Christianity were massacred in cold blood.[95]